An impetus was given to the active little population by our arrival, as we were in want of every thing. Mules, horses, and cattle, were to be collected; the horse-mill was at work day and night, to make sufficient flour; the blacksmith's shop was put in requisition for horse-shoes and bridle-bits; and pack-saddles, ropes, and bridles, and all the other little equipments of the camp, were again to be provided.

The delay thus occasioned was one of repose and enjoyment, which our situation required, and, anxious as we were to resume our homeward journey, was regretted by no one. In the mean time, I had the pleasure to meet with Mr. Chiles, who was residing at a farm on the other side of the river Sacramento, while engaged in the selection of a place for a settlement, for which he had received the necessary grant of land from the Mexican government.

It will be remembered that we had parted near the frontier of the states, and that he had subsequently descended the valley of Lewis's fork, with a party of ten or twelve men, with the intention of crossing the intermediate mountains to the waters of the Bay of San Francisco. In the execution of this design, and aided by subsequent information, he left the Columbia at the mouth of Malheur river, and, making his way to the head-waters of the Sacramento with a part of his company, traveled down that river to the settlements of Nueva Helvetia. The other party, to whom he had committed his wagons, and mill-irons, and saws, took a course further to the south, and the wagons and their contents were lost.

On the 22d we made a preparatory move, and encamped near the settlement of Mr. Sinclair, on the left bank of the Rio de los Americanos. I had discharged five of the party; Neal, the blacksmith, (an excellent workman, and an unmarried man, who had done his duty faithfully, and had been of very great service to me,) desired to remain, as strong inducements were offered here to mechanics.

Although at considerable inconvenience to myself, his good conduct induced me to comply with his request; and I obtained for him from Capt. Sutter, a present compensation of two dollars and a half per diem, with a promise that it should be increased to five, if he proved as good a workman as had been represented. He was more particularly an agricultural blacksmith. The other men were discharged with their own consent.

While we remained at this place, Derosier, one of our best men, whose steady good conduct had won my regard, wandered off from the camp, and never returned to it again, nor has he since been heard of.

24th.--We resumed our journey with an ample stock of provisions and a large cavalcade of animals, consisting of 130 horses and mules, and about 30 head of cattle, five of which were milch-cows. Mr. Sutter furnished us also with an Indian boy, who had been trained as a vaquero, and who would be serviceable in managing our cavalcade, great part of which were nearly as wild as buffalo, and who was, besides, very anxious to go along with us. Our direct course home was east, but the Sierra would force us south, above 500 miles of traveling, to a pass at the head of the San Joaquin river. This pass, reported to be good, was discovered by Mr. Joseph Walker, of whom I have already spoken, and whose name it might therefore appropriately bear. To reach it, our course lay along the valley of the San Joaquin--the river on our right, and the lofty wall of the impassable Sierra on the left. From that pass we were to move southeastwardly, having the Sierra then on the right, and reach the "Spanish trail," deviously traced from one watering-place to another, which constituted the route of the caravans from Puebla de los Angelos, near the coast of the Pacific, to Santa Fé of New Mexico. From the pass to this trail was 150 miles. Following that trail through a desert, relieved by some fertile plains indicated by the recurrence of the term vegas, until it turned to the right to cross the Colorado, our course would be northeast until we regained the latitude we had lost in arriving at Eutah lake, and thence to the Rocky mountains at the head of the Arkansas. This course of traveling, forced upon us by the structure of the country, would occupy a computed distance of 2,000 miles before we reached the head of the Arkansas--not a settlement to be seen upon it--and the names of places along it, all being Spanish or Indian, indicated that it had been but little trod by American feet. Though long, and not free from hardships, this route presented some points of attraction, in tracing the Sierra Nevada--turning the Great Basin, perhaps crossing its rim on the south--completely solving the problem of any river, except the Colorado, from the Rocky mountains on that part of our continent --and seeing the southern extremity of the Great Salt lake, of which the northern part had been examined the year before.

Taking leave of Mr. Sutter, who, with several gentlemen, accompanied us a few miles on our way, we traveled about 18 miles, and encamped on the Rio de los Cosumnes, a stream receiving its name from the Indians who live in its valley. Our road was through a level country, admirably suited to cultivation, and covered with groves of oak-trees, principally the evergreen-oak, and a large oak already mentioned, in form like those of the white-oak. The weather, which here, at this season, can easily be changed from the summer heat of the valley to the frosty mornings and bright days nearer the mountains, continued delightful for travelers, but unfavorable to the agriculturists, whose crops of wheat began to wear a yellow tinge from want of rain.

25th.--We traveled for 28 miles over the same delightful country as yesterday, and halted in a beautiful bottom at the ford of the Rio de los Mukelemnes, receiving its name from another Indian tribe living on the river. The bottoms on the stream are broad, rich, and extremely fertile, and the uplands are shaded with oak groves. A showy lupinus, of extraordinary beauty, growing four to five feet in height, and covered with spikes in bloom, adorned the banks of the river, and filled the air with a light and grateful perfume.

On the 26th we halted at the Arroyo de las Calaveras, (Skull creek,) a tributary to the San Joaquin--the previous two streams entering the bay between the San Joaquin and Sacramento rivers. This place is beautiful, with open groves of oak, and a grassy sward beneath, with many plants in bloom, some varieties of which seem to love the shade of the trees, and grow there in close small fields. Near the river, and replacing the grass, are great quantities of ammole, (soap plant,) the leaves of which are used in California for making, among other things, mats for saddle-cloths. A vine with a small white flower, (melothria?) called here la yerba buena, and which, from its abundance, gives name to an island and town in the bay, was to-day very frequent on our road--sometimes running on the ground or climbing the trees.