My first session of college work was over about July 1, 1843. The treasurer, Mr. Samuel Eliot, had given me leave to spend a small sum in replenishing the Botanic Garden. I met my friend and correspondent, William S. Sullivant, who had taken strongly to mosses, early in August, on the Alleghanies beyond Frostburg, Maryland (the railroad went only to Cumberland), he coming from Columbus, Ohio, I from Cambridge. There we bought a span of horses and a strong country wagon, and set out on the mountain expedition, some sketch of which is given in the “American Journal of Science” for January, 1846. (The first journey is more particularly detailed in the “American Journal of Science,” xlii., no. 1; 1842?) When Sullivant left me, at Warm Springs on the French Broad, anxious to get home, I was left in a pretty lonely condition. CHAPTER II. EARLY UNDERTAKINGS. 1831-1838. Dr. Gray’s autobiographical fragment closes abruptly, and is valuable chiefly for the glimpse which it gives of his ancestry and his boyhood. He kept no diary, but he carried on a voluminous correspondence, and his letters thus contain a record of his hard-working, eager life. The earliest tell of the struggle for position, his doubts if his loved science could furnish him a maintenance, and his resolution to make any sacrifice if he could devote himself to its study. His wants outside of appliances for scientific investigation were few, and he had a hopeful temper. He said in later life that when he was ready for anything it always came to him, and he never dwelt upon the hardships of his early years; indeed, he forgot them.