As soon as the snows were melted, so that the main range could be crossed, I went over into Middle Park, and proceeded thence down the Grand to the head of Cedar Canyon, then across the Park Range by Gore's Pass, and in October found myself and party encamped on the White River, about 120 miles above its mouth. At that point I built cabins and established winter quarters, intending to occupy the cold season, as far as possible, in exploring the adjacent country. The winter of 1868-69 proved favorable to my purposes, and several excursions were made, southward to the Grand, down the White to the Green, northward to the Yampa, and around the Uinta Mountains. During these several excursions I seized every opportunity to study the canyons through which these upper streams run, and while thus engaged formed plans for the exploration of the canyons of the Colorado. Since that time I have been engaged in executing these plans, sometimes employed in the field, sometimes in the office. Begun originally as an exploration, the work was finally developed into a survey, embracing the geography, geology, ethnography, and natural 121 powell-canyons-78.jpg THE START FROM GREEN RIVER STATION. FROM GREEN RIVER CITY TO FLAMING GORGE. history of the country, and a number of gentlemen have, from time to time, assisted me in the work. Early in the spring of 1869 a party was organized for the exploration of the canyons. Boats were built in Chicago and transported by rail to the point where the Union Pacific Railroad crosses the Green River. With these we were to descend the Green to the Colorado, and the Colorado down to the foot of the Grand Canyon. May 24, 1869.--The good people of Green River City turn out to see us start. We raise our little flag, push the boats from shore, and the swift current carries us down. Our boats are four in number. Three are built of oak; stanch and firm; double-ribbed, with double stem and stern posts, and further strengthened by bulkheads, dividing each into three compartments. Two of these, the fore and aft, are decked, forming water-tight cabins. It is expected these will buoy the boats should the waves roll over them in rough water. The fourth boat is made of pine, very light, but 16 feet in length, with a sharp cutwater, and every way built for fast rowing, and divided into compartments as the others. The little vessels are 21 feet long, and, taking out the cargoes, can be carried by four men.