The reason why the Lake of Geneva is of a crescent form is, that that is the shape of the space in the bottom of the valley which it fills. There are two ranges of mountains running in a curved direction almost parallel to each other, and the space between them, for a certain distance, is filled with water, owing to the spreading out of the waters of the Rhone in flowing through. Thus the lake is produced by the valley, and takes its form from it.

The valley does not come to an end when you reach the head of the lake, but continues for more than a hundred miles beyond, the two mountain ranges continuing to border it all that distance, and the River Rhone to flow through the centre of it. Thus at Villeneuve you look in one direction, and you have a winding valley filled with water, extending for fifty miles, to Geneva; while in the other direction, the same valley—though now the floor of it is a green and fertile plain—continues, with the same stupendous walls of mountain bordering the sides of it, for a hundred miles or more, to the sources of the Rhone.

There is another thing that is very curious in respect to this valley, and that is, that the floor of it is as flat, and smooth, and level, almost, where it is formed of land, as where it is formed of water.

Geologists suppose that the reason why the bottom of the valley, when it consists of land, is so perfectly level, is because the land has been formed by deposits from the river, in the course of a long succession of ages. Of course the river could never build the land any higher, in any part, than it rises itself in the highest inundations. Indeed, land formed by river deposits is almost always nearly level, and the surface of it is but little raised above the ordinary level of the stream, and never above that of the highest inundations.

It must, however, by no means be supposed that because the surface of the valley above the head of the lake is flat and level, that it is on that account monotonous and uninteresting. Indeed, it is quite the reverse. It forms one of the richest and most enchanting landscapes that can be conceived. It is abundantly shaded with trees, some planted in avenues along the roadside, some bearing fruit in orchards and gardens, and some standing in picturesque groups about the houses, or in pretty groves by the margin of the fields. The land is laid out in a very charming manner, in gardens, orchards, meadows, and fields of corn and grain, with no fences to separate them either from each other or from the road; so that in walking along the public highway you seem to walk in one of the broad alleys of an immense and most beautiful garden.

Besides all these beauties of the scene itself, the pleasure of walking through it is greatly increased by the number and variety of groups and figures of peasant girls and boys, and women and men, that you meet coming along the road, or see working in the fields, all dressed in the pretty Swiss costume, and each performing some curious operation, which is either in itself, or in the manner of performing it, entirely different from what is seen in any other land.

Rollo followed the main road leading up the valley a little way one evening, while his father and mother were at Villeneuve, in order, as he said, to see where the diligences went to. He was so much pleased with what he saw that he went back to the hotel, and began studying the guide book, in order to find how far it was to the next town, and what objects of interest there were to be seen on the way. He was so well satisfied with the result of his investigations that he resolved to propose to his father and mother to make a pedestrian excursion up the valley.

"Now, mother," said he, "I have a plan to propose, and that is, that we all set out to-morrow morning, and make a pedestrian excursion up the valley, to the next town, or the next town but one."

"How far is it?" asked Mrs. Holiday.

"Why, the best place to go to," said Rollo, "is Aigle, which is the second town, and that is only six miles from here."

"O Rollo!" said Mrs. Holiday; "I could not possibly walk six miles."

"O, yes, mother," said Rollo. "The road is as smooth, and level, and hard as a floor. Besides, you said that you meant to make a pedestrian excursion somewhere while you were in Switzerland, and there could not be a better place than this."

"I know I said so," replied Mrs. Holiday, "but I was not really in earnest. Besides, I don't think I could possibly walk six miles. But we will take a carriage and ride there, if your father is willing."

"But, mother, it is not so pleasant to ride You can't see so well, for the top of the carriage, or else the driver on his high seat before, will be more or less in the way. Then when you are walking you can stop so easily any minute, and look around. But if you are in a carriage, it makes a fuss and trouble to be calling continually upon the coachman to stop; and then, besides, half of the time, before he gets the carriage stopped you have got by the place you wanted to see."

What Rollo said is very true. We can see a country containing a series of fine landscapes much more thoroughly by walking through it, or riding on horseback, than by going in a carriage. I do not think, however, that, after all, this advantage constituted the real inducement in Rollo's mind which made him so desirous of walking to Aigle. The truth was, that the little walk which he had taken to Chillon with the party of pedestrian boys had quite filled his imagination with the pleasures and the independent dignity of this mode of travelling, and he was very ambitious of making an experiment of it himself.

"And, mother," continued Rollo, "after all, it is only about two hours and a half or three hours, at two or three miles an hour. Now, you are often gone as much as that, making calls; and when you are making calls you generally go, I am sure, as much as two or three miles an hour."

"But I generally ride, making calls," said Mrs. Holiday.

"Yes, mother, but sometimes you walk; and I think when you walk you are often gone more than three hours."

"That is true," said Mrs. Holiday, "I admit; but then, you know, when I am making calls I am resting a great deal of the time at the houses where I call."

"I know that," said Rollo; "and so we will rest, sitting down by the road side."

Mrs. Holiday admitted that Rollo had rather the best of the argument; but she was still quite unwilling to believe that she could really walk six miles.

"And back again, too," she added. "You must consider that we shall have to come back again."

"Ah, but I don't wish to have you walk back again," said Rollo. "We will come back by the diligence. There are several diligences and omnibuses that come by Aigle, on the way here, in the course of the day."

Mrs. Holiday was still undecided. She was very desirous of gratifying Rollo, but yet she had not courage to undertake quite so great a feat as to walk six miles. At length Mr. Holiday proposed that they should at least set out and go a little way.

"We can try it for half an hour," said he, "and then go on or turn back, just as we feel inclined. Or if we go on several miles, and then get tired, we shall soon come to a village, where we shall be able to get some sort of vehicle or other to bring us back; and at all events we shall have an adventure."

Mrs. Holiday consented to this plan, and it was settled that the party should breakfast at eight o'clock the next morning, and set out immediately afterwards.

Rollo had a sort of haversack which he used to carry sometimes on his walks, and he always kept it with him in the steamboat or carriage, when he travelled in those conveyances. This haversack he got ready, supplying it with all that he thought would be required for the excursion. He put in it his drinking cup,—the one which he had bought in Scotland,—a little spy glass, which he used for viewing the scenery, a book that his mother was reading, a little portfolio containing some drawing paper and a pencil, a guide book and map, and, lastly, a paper of small cakes and sugar plums, to give to any children that he might chance to meet on the way.

Rollo made all these preparations the evening before, so that every thing might be ready in the morning, when the hour for setting out should arrive.