Arriving in California in March, I was somewhat more than six months engaged in the work; in that time visiting seven reserves in California and one in the State of Washington, involving a cruise of 1,220 miles in the saddle and on foot, within the boundaries of the forest, besides 500 miles by wagon and stage. Since the addition of an extra member to the party is ever an added risk of impaired harmony, and since the practice of any art involving skill is always a pleasure, I employed no packer during the entire time of my absence, but did this work myself, assisted on the off-side by Mr. Thurston, who accompanied me, and who helped in every way within his power. May I take this opportunity to thank him for aid of many sorts, and on all occasions, and for unflagging interest in the problem which we had before us. California has long since ceased to be a country where the use of the pack train is a customary means of travel. It is now an old and long settled region where the frontier lies neither to the east nor to the west, but has escaped to the vicinity of timber line, nearly two miles straight up in the air. Comparatively few people outside of the Sierra Club, that admirable open-air organization of "the Coast," have occasion to visit it, and such trips as they make are of brief duration. Since it is not desirable to visit the high Sierras before the first of July, three full months were at my disposal for the study of the reserves of southern California, a section of great interest, and of the utmost importance to the State. In southern California one hears frequent mention of the Pass of Tehachapi; it is the line of demarcation between the great valley of central California, drained by the San Joaquin River on the north, and of southern California proper, which lies to the south. These two regions are of very different nature. In the San Joaquin Valley lie the great wheat fields of California. South of the Pass of Tehachapi, people are dependent upon irrigation. Here, too, lie wheat fields and also rich vineyards, and the precious orchards of oranges and lemons; further south the equally valuable walnut and almond groves.