All preparations being at length completed, on the morning of the 17th of August, just twenty days after having so providentially succeeded in reaching her port of refuge, the Nemesis was once more ready to continue her voyage.

On the 22nd August, she passed near the group of Rocky Islands, called Bassa da India, which are situated nearly in the middle of the channel, and pursued her voyage under sail. Of course, her progress was slow against an adverse wind, and no little anxiety was felt by her captain, on account of the uncertainty of the compasses, and their discrepancy with each other. She arrived, however, safely at Mozambique on the afternoon of the 31st, without having had occasion to use her engines, except just to carry her into the anchorage.

As she passed through the outer roads, she communicated with H.M. brig Acorn, Captain Adams, which was on the look-out for two slavers daily expected to arrive for cargoes; and, the better to entrap them, she had hoisted a sort of decoy-flag at her main, which she had already taken from one of the same description. While a short visit was being paid on board, a pilot had come off from the shore, to conduct the Nemesis into the inner harbour, where she was soon brought to within a quarter of a mile of the town. Little time, however, could be spared for the visit, but there was still some necessary work to be done on board, which could not be completed until the following day.

As the errors of the compasses have been alluded to above, and seem to have occasioned very great anxiety upon this passage, it may be well to make some remarks about them again in this place. It will be remembered, that before leaving Liverpool a long series of experiments had been made, which were intended to provide means of counteracting the local action of the iron of the ship's hull upon the compasses. But no worse place can be imagined than a crowded dock for the purpose of carrying on experiments of such nicety. Disturbing causes were continually operating, and the accident she met with on her way to Portsmouth proved that the correctness of the compasses was very far from being satisfactory. The experiments which were afterwards made at Portsmouth were also very doubtful in their result, in all probability owing, as before explained, to the absence of the boxes of chain or broken iron, which are always used by Professor Airy. It may readily be imagined that the utmost anxiety was always felt on board the vessel on this account, particularly when near the land; and many a long and anxious night has been spent on deck, with frequently a leadsman upon each of the paddle-boxes, to take soundings, and one in the bowsprit besides.

The large magnets, as originally placed in their positions, have never been moved, neither has the compass been changed in the slightest degree. But although they have greatly modified the errors, they have by no means sufficed to correct them. It has been always found the safest course not to put faith in the compasses at all; or rather, in this instance, observation showed that a compass, suspended in a box from a cross spar, at the height of ten or twelve feet above the head of the man at the helm, acted with much more accuracy than any other, and it was always the most relied on whenever it could be used.

It is scarcely to be doubted that the vessel has often made a longer passage than she would have done had the compasses been correct; for, in bad weather, when observations of the celestial bodies could not be taken, she could scarcely have avoided making many errors in her course. But nowhere were these difficulties felt more anxiously than in this passage through the Mozambique Channel, where land could never be very far distant. The necessity for a constant good look-out, and for two or even three men in the chains, produced anxiety and fatigue in itself; while it was also necessary for the officers to have the advantage of taking the altitudes of the stars, whenever the night was clear enough, not only once, but many times during the night. The compasses not only differed from the true points, but differed also from each other; and particularly in the Mozambique Channel, it was observed that they differed more than elsewhere, without being influenced however by the rapid atmospheric changes which prevailed. The more the ship's course was directed towards the true pole, the less was the error of the compass; but gradually, as her course was changed towards the east or west, so did the errors and discrepancies of the compasses increase.

It is satisfactory to know that the same degree of difficulty was not experienced on board the other iron steamers which were sent out afterwards; and as the Nemesis was the first of her class that ever made the voyage, it is right here to record the difficulties she encountered under this head. Many an anxious watch has been spent on deck, trying to catch the altitude of particular stars as they emerged, for a moment, from the dense clouds or haze; and much of this kind of labour, so frequently repeated, would have been saved had her compasses been trustworthy.[9]

It is now time to return to the anchorage at Mozambique, where we left the Nemesis. Of course as she passed the principal Portuguese fort, she fired a salute, which was returned, and immediately became the signal to the whole town that something uncommon was to be expected. The arrival of a large steamer was soon made known in every direction, and not only became a source of curiosity to all, but an object of great alarm to many. The first impression was that she was sent purposely to put an end to the slave-trade at that place, and the consternation became general; for the governor, of whom more will presently be said, at once encouraged this opinion, which he felt would strengthen his power, as it did his determination, which was proved to be perfectly sincere, to do his utmost to stop the trade. Those most interested in the traffic had already begun openly to defy his power, and had not hesitated to declare to him that they would still carry it on in some of the shallow rivers, where vessels of war could not approach them. But the sight of a large steamer, running along close in shore, almost as if she were a small boat, drawing at the same time only five feet and a half of water, at once damped their ardour. They never could have dreamed that a large heavily-armed vessel could move wherever she pleased through their smallest streams; and their alarm was proportioned to their surprise.

Shortly before this, there had been so strong a disposition to resist the governor's power, that it had amounted almost to a rebellion; and his Excellency, though a bold man, and the first governor of the Portuguese possessions on that coast, who had come with the honest determination to stop the trade at all hazards, felt himself in a very awkward position. He, however, felt himself strong enough to take extreme measures, the moment he saw the steamer so close to the town. He afterwards admitted that her arrival was most opportune, and so pleased was he, at the same time, that he turned at once upon the slave-dealers; even that very day he seized two large slavers, condemned them at once, and publicly sold them by auction before the day was over. Such vigorous measures had been quite unknown under any former governor, and at once proved, both to the Portuguese and to the world, that his professions were real, and that he meant to keep his word. He had before this taken strong measures against the dealers in slaves, but this bold step was the finishing stroke of his policy, and at once filled all parties with dismay. In fact, trade of all kinds was stagnant for the moment, in consequence of the measures adopted; and large heaps of valuable ivory were lying there useless, in consequence of the impossibility, or, at all events, extreme hazard, of sending the usual slave-ships to sea, which would convey it to a market.

The governor is a brigadier-general in the Portuguese service, by name Joachim Pereira Morinho, and had formerly served under the Duke of Wellington in the Peninsula. He had not been long on the coast; but, as he had come with a full determination to destroy the slave-trade, or, at all events, to do his utmost towards it, he had already been long enough there to gain the ill-will of all the Portuguese residents. Indeed, he did not live altogether in security from violence, arising from the vindictive feelings of those interested in the traffic; and he had, therefore, requested Captain Adams, in the Acorn, to remain there as long as he could, to afford him protection; and had also detained a small brig-of-war, belonging to his own country, named the Villa Flora, to overawe the sea-faring part of the population.

The governor seemed to entertain the best feelings towards the English generally, with whom he had associated a good deal, and particularly inquired what assistance he could give to the Nemesis. As fuel and vegetables were, of course, most in request, they were mentioned. He appeared quite pleased to have it in his power to furnish something that would be of use to her; and, to the gratification of every one, a large boat came off to the ship early in the morning, bringing a fat ox, four sheep, a large pig, and some vegetables and fruit; besides which, there was also a large country boat, full of wood, containing eight thousand pieces. In addition to these very handsome presents, he also proposed to fill up the ship's water free of expense. This was accompanied by a note, in Portuguese, from the secretary-general of the province, Don Antonio Julio di Castro Pinto, of high degree and higher-sounding name, who was charged by his Excellency to offer the good things above-mentioned, "as a mark of his good-will, and of his sense of the service which the visit of the Nemesis would render to the cause of anti-slavery, and, at the same time, as a trifling present to a brother in arms from an old soldier, grown grey in the service of his country, both at home and abroad."

Nothing could have been more acceptable, and, through the active assistance which the Nemesis received, she was enabled to proceed on her voyage, after little more than a day's delay. As an acknowledgment of his Excellency's attention, a trifling present of some capital hollands, preserved salmon, and English pickles, were sent to him, which were very great luxuries in that part of the world, and appeared to be duly appreciated. His Excellency had never before seen a steamer in those parts; and, the better to acknowledge his good-nature, and increase the sensation her arrival had produced on shore, he was invited by Captain Hall, to come on board to look at the ship, and to partake of such refreshment as she had to offer. This was, accordingly, a grand day for all parties, and the 1st of September, 1840, will, on many accounts, be long remembered at Mozambique.

His Excellency came on board in his state-barge, attended by all his suite, in full uniform, under a salute from the batteries and the Portuguese brig-of-war, while crowds of spectators stood upon every point on shore, whence a good view could be obtained. The deck of the Nemesis, though rather crowded with visitors, presented a gay appearance, from the variety of uniforms and foreign orders, which all those who were entitled to them, not few in number, displayed upon the occasion.

Sufficient time having been spent in viewing the ship and inspecting the machinery, which few of them had ever seen before, the whole party sat down to a grand dÉjeÛner À la fourchette. Now, it may seem that a trifling incident of this sort could have no possible connexion with the suppression of the slave-trade; and, moreover, this latter question has been more frequently discussed at tea-drinking parties among benevolent ladies, than at champagne luncheons among the redoubtable sons of Mars. Yet the impression which a thing makes is often of more consequence than might otherwise be anticipated from the trifling nature of the thing itself.

The healths of the Queens of England and of Portugal were drank with three times three, followed immediately by a salute of twenty-one guns, both from the steamer and the Portuguese brig. The effect of this upon the inhabitants was by no means unimportant; it impressed them more than ever with the conviction, that the governments of the two countries were perfectly united in their determination to suppress the slave-trade; and the sound of the royal salutes ringing in their ears, completely put an end, for the moment certainly, to all their inclinations to resist the governor's authority.

In proof of his determination to do his utmost to suppress the slave-trade, General Morinho had already ordered one of the deputy-governors to be brought up to Mozambique, to be tried by court-martial for disobedience of orders, in permitting the trade under his own eyes; and, it has already been mentioned, that, from the information which was given by the Nemesis, of the slave-brig at Delagoa Bay, lying under the very guns of the fort, the governor of that settlement was also to be sent for.

That no attention might be omitted, after the great kindness his Excellency had shown to all on board, he and his party were steamed some way up the river, to show them the capabilities of the vessel; thousands of boats crowded round her in all directions, while the house-tops, the fort, the beach, and all the ships in port, were covered with people anxious to see the greatest novelty the place had ever been witness to—the first steamer, moving with rapidity about their fine harbour, and in whatever direction she pleased.

A few words may not be out of place concerning the position of Mozambique, and its eligibility as a place of call for fuel, should steamers be sent more frequently by that route to India. The following description of the harbour, taken from Captain Owen's narrative of his surveys on that coast, will be found perfectly correct. "It is formed by a deep inlet of the sea, five and a half miles broad and six long, receiving the waters of three inconsiderable rivers at its head. At the entrance are three small islands, which, together with reefs and shoals, render the anchorage perfectly safe in the worst weather. Of these islands, that of Mozambique, on which stands the city, is completely formed of coral, very low and narrow, and scarcely one mile and a half in length. It is situated nearly in the centre of the inlet, and just within the line of the two points that form its extremities. The other two islands, called St. George and St. Jago, lie about three miles outside of Mozambique, but close to each other. They are uninhabited, although covered with rich verdure and trees, but upon a coral foundation."

Mozambique was taken from the Arabs by the Portuguese, at the very commencement of the sixteenth century; and the extent of the fort of St. Sebastian, built there by them, and which, even now, might be rendered a very strong fortification, capable of mounting nearly a hundred guns, if in proper repair, will be sufficient to show the great importance which they attributed to it, even in that early period of its settlement. It still contains large barracks and extensive quarters and storehouses, but only a very small and feeble garrison, of scarcely more than a couple of hundred men, either black or creole sepoys. There are likewise two other smaller forts upon the island, which may therefore be considered strongly fortified, although more indebted to the past than to the present, for the importance, which, at first view, it appears to possess.

The public buildings of Mozambique all bespeak the value of the settlement to its possessors, in the days of Portuguese maritime distinction. The governor's palace must have been, in its best days, a residence worthy of an influential ruler. It is built of stone, is of considerable extent, and has some fine rooms in it; in fact, it speaks much for the importance attached by the Portuguese, in former times, to their eastern possessions. The large stone wharf, built on handsome arches, with the fine Custom House, in a sort of square at the extremity of it, clearly point out the ancient commercial value of the settlement; withered at last, perhaps, more by the paralysing effects of the slave-trade, than by any natural decrease in the commercial capabilities of the east coast of Africa.

In short, the city has retrograded into comparative insignificance; the number of resident Portuguese has become very inconsiderable, with the exception of some Canareens or creole Portuguese, born in other Portuguese possessions in India, and, though commonly called white, only so "by courtesy," being often quite as black as the true Indians. Bad government and moral deterioration have added not a little to the other causes of its downfall; and it will scarcely be credited, that a distinct law has been passed, that those who were married should be compelled to remain there, or, at least, not return to their own country. The effect of so extraordinary a measure, has been, that nobody is disposed to get married at all; and, so low a tone of moral feeling has come to prevail, that the sexes live together openly, without any matrimonial or moral ties, and with little feeling of shame at the absence of them.

I have dwelt a little upon these particulars concerning Mozambique, because it is the principal of all the Portuguese settlements on that coast; and if, as such, it has fallen so far from its former state, we may judge how the others must now be lingering on between life and death. The fatal influence of the slave-trade appears to paralyse the whole commercial traffic of the country; the natives, being reduced to mutual distrust of each other, and continually living in fear and poverty, are unable to purchase the comforts of foreign manufactures. The selling of slaves is almost the only profit of the chiefs, unfitting them for every other enterprise, and deadening within them every feeling of honour and every hope of improvement. A universal stagnation seems to hang over the mind of man, as well as over the productions of the earth. Were it not for the industry of the Arab population in the neighbourhood, a periodical famine would inevitably occur. At the present moment, the whole of the Portuguese possessions, along the Rios da Senna, do not supply even enough grain for their own consumption. Yet the country is a remarkably fine one, capable of producing luxuriantly all the fruits of the earth, and, were it cleared and cultivated, would become habitable even for Europeans, through the improvement of its climate; yet, there is much land now neglected and barren, which was once highly cultivated.

The slave-trade is, in fact, a worse pestilence to the country than even the fever itself; and Mozambique, Quillimane, Delagoa Bay, Sofala, and Inhamban, are all fallen to the lowest grade of civilization. If you ask the simple tale of history, what has been the effect of Portuguese rule upon that coast, you will hear neither of savages reclaimed, soil improved, commerce extended, justice and mercy practised, nor Christianity taught. The blight of slavery has poisoned everything on which it rested.

Nevertheless, as a place of call for refreshment, for ships passing through the Channel, Mozambique has some claims to attention. Abundance of vegetables and fruit are to be obtained there; pigs and goats are readily to be purchased, as well as poultry, and, were the demand for bullocks larger, they would soon be brought to market in numbers. At present, however, they are very dear.

But the great treasure of the place remains yet to be developed; at all events, the subject is well open to investigation. The existence of good coal in that neighbourhood is now, I believe for the first time, made public. There is reason to expect that it will be found in large quantity, and of good quality, although as yet the search for it has not been carried on to any great extent. The all-engrossing subject of the slave-trade seems to darken every other object of attention in that quarter, and the Portuguese are probably afraid that the discovery of coal in their settlements would occasion the continual visits of so many steamers and other vessels, that even greater difficulty would be thrown in the way of the traffic.

Just as the Nemesis was leaving the harbour, the captain of an English merchant ship, the only one there at the time, brought off a large piece of excellent coal for inspection. It had all the appearance of coal perfectly adapted for steaming purposes; it was stated to be found at Quillimane, (the settlement before alluded to) about three hundred miles to the southward of Mozambique, and that there is every reason to believe it might be procured in large quantities, and worked without difficulty. This specimen was sent to England for examination, by Captain Hall; but it has since been ascertained that it did not reach its destination. This is on all accounts to be regretted. It was sent down to the Cape of Good Hope from Mozambique, in a box, with directions that it should be forwarded to the India House, but was probably lost, or set aside at the Cape.

If further investigation should prove what is here stated to be correct, there can be no reason for not searching for coal upon other parts of the coast; and under any circumstances, as Quillimane is so short a distance from Mozambique, the coal might easily be brought up to the latter at little expense; and, if it were to become a more frequented route to India, it would be desirable to moor a large coal-hulk off the town, in which a constant supply of coal could be kept ready, and which could be taken in rapidly, and at little expense, by a steamer running up alongside of her.

But the Portuguese, unfortunately, seem quite blind, even to their own interests; and they cannot perceive, that if they could work coal-mines, they would employ a large population, circulate wealth throughout their territory, and attract a considerable and improving commerce to their port. But then their slave-trade would be ruined: and they are not even wise enough in their own generation to perceive, that out of its very ashes would gradually spring up the healthy and vigorous plant of commerce, upon an extensive scale, not only with foreign parts, but with the native tribes of Africa. These, however, are now continually desolated by the scourge of war and slavery. But they would soon learn to value peace and peaceful arts, and the taste for new articles of manufacture would grow gradually into wants, and wants in course of time give birth to the wish for luxuries. Far above all the profits of the traffic in human beings, would then become the fruits of wholesome trade; the country would advance, instead of being driven back; and the welfare of the community and of the government be simultaneously promoted.

New regulations respecting trade would in the first instance be indispensable, as at the present time the commandants or little governors of all the minor Portuguese settlements are themselves allowed to trade, and often are the principal, or in a manner the only, merchants in the place. This alone must destroy all healthy competition, the soul of commerce. But, were trade placed upon a proper footing, and coal likely to become an article of demand, it would easily be exported to the Cape, Mauritius, and up to Aden for the Bombay steamers, and to numerous other parts, in which the demand for coal is yearly increasing, and likely to become almost unlimited.

I have here rather assumed that coal will be found in large quantity than proved it; but sufficient has been said to point out the great probability of its existence upon that coast in more places than one, and the question involves such important consequences that it deserves the fullest investigation.

It was at one time thought that coal would be found in some one of the Comoro islands before alluded to, at the northern extremity of the Mozambique Channel; and the Nemesis was directed, at all events, to touch there on her way, for the purpose of inquiring into its eligibility as a depÔt, and place of refreshment for steamers.

The distance of the nearest of the Comoro islands, Mohilla, from Mozambique, is scarcely two hundred and fifty miles; and from thence to Johanna, which is the principal one, and the place of residence of the sultan or ruler of the islands, is about thirty miles. Johanna lies as near as possible in the middle of the Channel, between Madagascar and the mainland of Africa, just where it widens into the open sea.

The Nemesis took her departure from Mozambique on the evening of the 1st of September, but did not reach Johanna until the afternoon of the 4th, having made nearly the whole distance under sail only, against a very strong south-westerly current.

The island of Mohilla is, of course, the first seen, and strikes you by its lofty, wooded summit, and the numerous small islets which surround it to the southward. The Channel between Mohilla and Johanna is picturesque, and the high inland mountains every where present a rich and refreshing appearance, being covered with luxuriant wood, and broken occasionally into deep glens, marked by the usual rich tropical verdure. Johanna is the most frequented of all the islands, and affords the best anchorage. But it was quite dark before the Nemesis approached the bay, and an occasional blue light and a rocket were let off, to give notice of her approach, in order that a pilot might come off, or else a signal be made to direct her to the best anchorage.

A large fire was soon lighted on shore for this purpose; and, no sooner did she come within a moderate distance, than numerous boats came alongside; the natives jumped on board, in apparent delight at seeing her come in, not unmixed with extreme surprise at her appearance, and the mode in which she moved through the water. Several of them spoke broken English, and although they were naturally delighted at the prospect of earning a little money, they were even more so at the sight of her armament, and at once concluded that she was sent purposely to assist the sultan and the people of the island, who were at that time in great danger and trouble.

Johanna is occasionally frequented by English ships, for provisions, which are there abundant and reasonable, and the people have become favourably known in England, in consequence of their kind treatment of numerous poor English seamen, who have from time to time been wrecked on those islands, or on the neighbouring coasts. The great bay, which is on the northern side of the island, is not, however, a very suitable anchorage, except, perhaps, during the S.W. monsoon. At all times, there is a very heavy surf rolling in shore; and, during the N.E. monsoon, which sets directly into it, the heavy swell renders the anchorage unsafe. It cannot, therefore, be considered at all eligible as a coal depÔt for steamers, particularly when Mozambique, which has greater claims to attention, is within such a moderate distance. Still, it is a very useful place of refuge for our whaling ships in that part of the world; and, as the inhabitants, as well as the authorities, have always shewn great kindness to the English, and, in fact, consider themselves almost in the light of allies of England, it would seem politic to keep alive the good feeling they evince toward us.

The inhabitants of these islands are principally of Moorish origin, nearly all Mohammedans, and they wear the turban and loose dress which belong to no part of the neighbouring coast; and a dagger or pistols in their girdle are by no means uncommon. They have a genuine old English or Arab mode of shaking hands, with a gaiety of manner that is very pleasing. Their features are regular, and well formed, and their complexion, though dark, is very different from that of the inhabitants, either of the neighbouring continent, or of the island of Madagascar. In short, it is evident, that they were originally emigrants from some distant part, probably Arab traders, although their appearance has become modified in the course of successive generations.

These islanders appear to be rather favourites of the different men-of-war and merchant ships which touch there; though they have acquired a character for duplicity and cunning, and, consequently, for telling falsehoods, which at the same time they smooth over with the most artful flattery. But high testimony has been often borne to their kindness and hospitality towards Englishmen in distress; and, when the Exmouth grounded there several years ago, with a great number of passengers, on her way home, the Sultan Abdallah, the father of his present highness, particularly distinguished himself, by even attending in person to direct the efforts of his men, who came to assist in getting the vessel off. He paid the utmost attention to all the passengers, particularly to the women and children, taking care that they should be provided with every thing he could furnish for their comfort, until they could pursue their voyage further. Nor is this by any means a solitary instance of the kind services which they have rendered to our countrymen.

[9] With respect to the effects of lightning upon an iron ship, and the danger which was to be apprehended from the attraction, both of the vessel as a body, and of its particular parts as points for the electrical fluid to touch upon in its passage between the clouds and the earth, no inconvenience whatever seems to have been felt. Much had been said about it in England before her departure for a tropical region. The timid, and those less acquainted with the subject, openly expressed their apprehensions; the learned smiled with more of curiosity than fear; but the officers of the vessel itself were too busy about other matters to give themselves time to think much about the question. During their voyage to the southward, when many dangers were encountered, certainly that from lightning was amongst the least thought of; and now, as they were passing through the Mozambique Channel, a part of the world particularly famous for its heavy storms of thunder and lightning, not the slightest effect from it was observed upon the iron vessel. The funnel has a perfectly smooth top, without any ornamental points, such as are sometimes seen; and the main rigging and funnel stays were made of chain at the top, and rope throughout the rest.