We came back from our expedition with an abundance of venison, a number of interesting color-studies, and memories of California scenery surpassed only by the Yo-Semite. We had struggled through miles of _chaparral_, after which no abatis that I ever saw on the Potomac would have been any discouragement to us, provided only we had the same wonderful horses. To get some idea of this peculiarly Californian institution as we encountered it, imagine a side-hill which would have given the best horse a hard pull, even had it been bare of undergrowth, and set this hill as thick as it will hold with _manzanita_ and burr-oak: the former, as its name implies, like a little apple-tree, only more viciously gnarled, leathery, and complicated in its boughs than the most picturesque old russet in a New-England orchard, and ramifying at once from the root without any main trunk; the latter, an oak-bush of the same general characteristics, having its swarming acorn-cups covered with spikes like the chestnut. When these have interlocked with each other till the earth is invisible and the whole tract has become a lattice of springes and pitfalls, push a horse through it three miles up a slope of forty-five degrees, the breast-high twigs scourging him at every step; and if you get out, as we did, without a fall or a broken leg to either man or beast, you will not only have acquired a just idea of the California _chaparral_, but an admiration for the California horse which will last you to your dying-day. To repay us for this struggle, we had found one lake lying in a precipitous gorge, only twice before visited by white men; while Bierstadt, always the indefatigable explorer of every party we were in together, climbed with his color-box to still another lake, of which he was the first discoverer, and whose lovely lineaments he preserved in one of the best studies of our trip. Besides these results of our expedition, we brought away the satisfaction of having leaped our horses across the Sacramento River. Where it flowed at the bottom of one deep ravine we had to traverse, it was a foot deep and ten feet wide. The twig which cracked under my horse's hoof, and fell into the stream as he sprang over, a month hence might be dashing about in the scud under the foot of some Pacific whaler, or, still farther off in time, drift into the harbor of Hong Kong. Rivers always seem to me like the nerves of Nature: there is no conductor of thought and impression like that little silver thread which leads out from the ganglion of a deep forest-spring, to spread, many leagues off, upon the sensory surface of the Oceanic World. In an earlier article I spoke of the mighty emotions which came thronging on me at the heads of the Platte and the Colorado: I felt them only less powerfully when my horse jumped across the Sacramento's birthplace.