Events transpire rapidly when a country is in a state of revolution. Early in March of '46 the little party of explorers received the "first hostile message" from General Castro—the Commandant General of California—which, though really a declaration of war, upon a party sent out by the United States Government on a purely scientific expedition, had been received and acted upon by Fremont with moderation, and actual war had not been declared until July, when Sonoma was taken, and the flag of Independence hoisted on the fourth of that month, and Fremont elected Governor of California.

While hearing indefinitely of these events, Commodore Sloat, who, with the vessels belonging to his command, was lying at Monterey, had hoisted the flag of the United States over that city, anticipating any command to do so on the part of his government, and anticipating also the action of the commander of the British ship of war, sent for a similar purpose, which arrived at Monterey on the 19th of July, under the command of Sir George Seymour; one of whose officers, in a book published by him after his return to England, describes the entrance of Fremont and his party into Monterey as follows:

"During our stay in Monterey," says Mr. Walpole, "Captain Fremont and his party arrived. They naturally excited curiosity. Here were true trappers, the class that produced the heroes of Fennimore Cooper's best works. These men had passed years in the wilds, living upon their own resources; they were a curious set. A vast cloud of dust appeared first, and thence in long file emerged this wildest wild party. Fremont rode ahead, a spare, active-looking man, with such an eye! He was dressed in a blouse and leggings, and wore a felt hat. After him came five Delaware Indians, who were his body-guard, and have been with him through all his wanderings; they had charge of two baggage horses. The rest, many of them blacker than the Indians, rode two and two, the rifle held by one hand across the pommel of the saddle. Thirty-nine of them are his regular men, the rest are loafers picked up lately; his original men are principally backwoodsmen, from the State of Tennessee and the banks of the upper waters of the Missouri. He has one or two with him who enjoy a high reputation in the prairies. Kit Carson is as well known there as 'the Duke' is in Europe. The dress of these men was principally a long loose coat of deer skin, tied with thongs in front; trowsers of the same, of their own manufacture, which, when wet through, they take off, scrape well inside with a knife, and put on as soon as dry; the saddles were of various fashions, though these and a large drove of horses, and a brass field-gun, were things they had picked up about California. They are allowed no liquor, tea and sugar only; this, no doubt, has much to do with their good conduct; and the discipline, too, is very strict. They were marched up to an open space on the hills near the town, under some large fires, and there took up their quarters, in messes of six or seven, in the open air. The Indians lay beside their leader. One man, a doctor, six feet six high, was an odd-looking fellow. May I never come under his hands!"

Commodore Stockton had arrived the same day with Fremont and Carson and their command, and under him Fremont had been appointed General in Chief of the California forces, with Carson for his first Lieutenant; Stockton assuming the civil office of Governor of the country. This had been deemed a measure of necessity, from the fact that the California Mexicans had not yet learned, from the Mexican authorities, the actual declaration of war between the United States and Mexico; and therefore looked upon the operations of the Americans as the acts of adventurers for their own aggrandizement; and yet, with all the intensity of feeling such ideas aroused, Fremont and Carson had won their admiration and their hearts, by the rapidity of their movements, their sudden and effective blows, and the effort by dispatch to avoid all cruelty and bloodshed as far as possible.

In this way had San Diego, San Pedro, Los Angelos, Santa Barbara, and the whole country, as the Mexican authorities declared, come into the possession of Commodore Stockton and General Fremont, as a conquered territory, taken in behalf of the United States; and the whole work been completed in about sixty days from the time the first blow was struck; and when all was accomplished, and the conquest complete, Carson started upon his errand to communicate the intelligence to the general government at Washington; with the knowledge that all the leading citizens of California, native as well as the American settlers, were friendly to Fremont, and on his account to Commodore Stockton.

During the three months of Carson's absence, events had transpired that made it necessary to do this work over again, resulting in a measure from the indiscretions of American officers, which induced insurrection on the part of the Mexicans. The arrival of General Kearney with United States troops still further excited them, and produced results which were everything but pleasant to Fremont and Commodore Stockton, the details of which we forbear to give, simply saying that Carson's regard for Fremont showed itself by his return to his service, and doing all that he could to forward his interests, and in his often attending him in his excursions. Fremont's command was an independent battalion; and concerning the last and final contest, General Kearney thus wrote to the War Department:

"This morning, Lieutenant-Colonel Fremont, of the regiment of mounted riflemen, reached here with four hundred volunteers from the Sacramento; the enemy capitulated with him yesterday, near San Fernando, agreeing to lay down their arms; and we have now the prospect of having peace and quietness in this country, which I hope may not be interrupted again."

It was during Carson's absence, en route for Washington, that Fremont accomplished the most extraordinary feat of physical energy and endurance ever recorded. We find it in the "National Intelligencer," of November 22, 1847, and quote it entire, as illustrating not only the physical powers of human endurance produced by practice and culture, but the wonderful sagacity and enduring qualities of the California horses:

"The Extraordinary Ride of Lieut. Col. Fremont, his friend Don Jesus Pico, and his Servant, Jacob Dodson, from Los Angelos to Monterey and Back in March, 1847.

"This extraordinary ride of 800 miles in eight days, including all stoppages and near two days' detention—a whole day and a night at Monterey, and nearly two half days at San Luis Obispo—having been brought into evidence before the Army Court Martial now in session in this city, and great desire being expressed by some friends to know how the ride was made, I herewith send you the particulars, that you may publish them, if you please, in the National Intelligencer, as an incident connected with the times and affairs under review in the trial, of which you give so full a report. The circumstances were first got from Jacob, afterwards revised by Col. Fremont, and I drew them up from his statement.

"The publication will show, besides the horsemanship of the riders, the power of the California horse, especially as one of the horses was subjected, in the course of the ride, to an extraordinary trial, in order to exhibit the capacity of his race. Of course this statement will make no allusion to the objects of the journey, but be confined strictly to its performance.

"It was at daybreak on the morning of the 22d of March, that the party set out from La Ciudad de los Angelos (the city of the Angels) in the southern part of Upper California, to proceed, in the shortest time, to Monterey on the Pacific coast, distant full four hundred miles. The way is over a mountainous country, much of it uninhabited, with no other road than a trace, and many defiles to pass, particularly the maritime defile of el Rincon or Punto Gordo, fifteen miles in extent, made by the jutting of a precipitous mountain into the sea, and which can only be passed when the tide is out and the sea calm, and then in many places through the waves. The towns of Santa Barbara and San Luis Obispo, and occasional ranches, are the principal inhabited places on the route. Each of the party had three horses, nine in all, to take their turns under the saddle. The six loose horses ran ahead, without bridle or halter, and required some attention to keep to the track. When wanted for a change, say at the distance of twenty miles, they were caught by the lasso, thrown either by Don Jesus or the servant Jacob, who, though born in Washington, in his long expeditions with Col. Fremont, had become as expert as a Mexican with the lasso, as sure as the mountaineer with the rifle, equal to either on horse or foot, and always a lad of courage and fidelity.

"None of the horses were shod, that being a practice unknown to the Californians. The most usual gait was a sweeping gallop. The first day they ran one hundred and twenty-five miles, passing the San Fernando mountain, the defile of the Rincon, several other mountains, and slept at the hospitable ranche of Don Thomas Robberis, beyond the town of Santa Barbara. The only fatigue complained of in this day's ride, was in Jacob's right arm, made tired by throwing the lasso, and using it as a whip to keep the loose horses to the track.

"The next day they made another one hundred and twenty-five miles, passing the formidable mountain of Santa Barbara, and counting upon it the skeletons of some fifty horses, part of near double that number which perished in the crossing of that terrible mountain by the California battalion, on Christmas day, 1846, amidst a raging tempest, and a deluge of rain and cold more killing than that of the Sierra Nevada—the day of severest suffering, say Fremont and his men, that they have ever passed. At sunset, the party stopped to sup with the friendly Capt. Dana, and at nine at night San Luis Obispo was reached, the home of Don Jesus, and where an affecting reception awaited Lieutenant-Colonel Fremont, in consequence of an incident which occurred there that history will one day record; and he was detained till 10 o'clock in the morning receiving the visits of the inhabitants, (mothers and children included,) taking a breakfast of honor, and waiting for a relief of fresh horses to be brought in from the surrounding country. Here the nine horses from Los Angelos were left, and eight others taken in their place, and a Spanish boy added to the party to assist in managing the loose horses.

"Proceeding at the usual gait till eight at night, and having made some seventy miles, Don Jesus, who had spent the night before with his family and friends, and probably with but little sleep, became fatigued, and proposed a halt for a few hours. It was in the valley of the Salinas (salt river called Buenaventura in the old maps,) and the haunt of marauding Indians. For safety during their repose, the party turned off the trace, issued through a caÑon into a thick wood, and laid down, the horses being put to grass at a short distance, with the Spanish boy in the saddle to watch. Sleep, when commenced, was too sweet to be easily given up, and it was half way between midnight and day, when the sleepers were aroused by an estampedo among the horses, and the calls of the boy. The cause of the alarm was soon found, not Indians, but white bears—this valley being their great resort, and the place where Col. Fremont and thirty-five of his men encountered some hundred of them the summer before, killing thirty upon the ground.

"The character of these bears is well known, and the bravest hunters do not like to meet them without the advantage of numbers. On discovering the enemy, Col. Fremont felt for his pistols, but Don Jesus desired him to lie still, saying that 'people could scare bears;' and immediately hallooed at them in Spanish, and they went off. Sleep went off also; and the recovery of the horses frightened by the bears, building a rousing fire, making a breakfast from the hospitable supplies of San Luis Obispo, occupied the party till daybreak, when the journey was resumed. Eighty miles, and the afternoon brought the party to Monterey.

"The next day, in the afternoon, the party set out on their return, and the two horses rode by Col. Fremont from San Luis Obispo, being a present to him from Don Jesus, he (Don Jesus) desired to make an experiment of what one of them could do. They were brothers, one a grass younger than the other, both of the same color, (cinnamon,) and hence called el caÑalo, or los caÑalos, (the cinnamon or the cinnamons.) The elder was to be taken for the trial; and the journey commenced upon him at leaving Monterey, the afternoon well advanced. Thirty miles under the saddle done that evening, and the party stopped for the night. In the morning, the elder caÑalo was again under the saddle for Col. Fremont, and for ninety miles he carried him without a change, and without apparent fatigue. It was still thirty miles to San Luis Obispo, where the night was to be passed, and Don Jesus insisted that caÑalo could do it, and so said the horse by his looks and action. But Col. Fremont would not put him to the trial, and, shifting the saddle to the younger brother, the elder was turned loose to run the remaining thirty miles without a rider. He did so, immediately taking the lead and keeping it all the way, and entering San Luis in a sweeping gallop, nostrils distended, snuffing the air, and neighing with exultation at his return to his native pastures; his younger brother all the time at the head of the horses under the saddle, bearing on his bit, and held in by his rider. The whole eight horses made their one hundred and twenty miles each that day, (after thirty the evening before,) the elder cinnamon making ninety of his under the saddle that day, besides thirty under the saddle the evening before; nor was there the least doubt that he would have done the whole distance in the same time if he had continued under the saddle.

"After a hospitable detention of another half a day at San Luis Obispo, the party set out for Los Angelos, on the same nine horses which they had rode from that place, and made the ride back in about the same time they had made it up, namely, at the rate of 125 miles a day.

"On this ride, the grass on the road was the food for the horses. At Monterey they had barley; but these horses, meaning those trained and domesticated, as the caÑalos were, eat almost anything of vegetable food, or even drink, that their master uses, by whom they are petted and caressed, and rarely sold. Bread, fruit, sugar, coffee, and even wine, (like the Persian horses,) they take from the hand of their master, and obey with like docility his slightest intimation. A tap of the whip on the saddle, springs them into action; the check of a thread rein (on the Spanish bit) would stop them: and stopping short at speed they do not jostle the rider or throw him forward. They leap on anything—man, beast, or weapon, on which their master directs them. But this description, so far as conduct and behavior are concerned, of course only applies to the trained and domesticated horse."