"Dr. Crosby, though a surgeon by nature and by preference, was in no modern sense a _specialist_. His professional labors covered the whole range of Medicine. His professorship included Obstetrics as well as Surgery, and his practice in this department was exceptionally large. His surgical diocese extended from Lake Champlain to Boston. Distance seemed no bar to his influence, and his professional journeys were often made by night as well as by day. Of the special operations of Dr. Crosby we do not propose here to speak in detail. It is sufficient to mention that, in 1824, he devised a new and ingenious mode of reducing metacarpo-phalangeal dislocation. In 1836 he removed the arm, scapula, and three quarters of the clavicle at a single operation, for the first time in the history of Surgery. He was the first to open abscess of the hip-joint. He performed his operations, without ever having seen them performed, almost without exception. Dr. Crosby was not what may be called a _rapid_ operator. 'An operation, gentlemen,' he often said to his clinical students, 'is soon enough done when it is _well_ enough done.' And, with him, it was never done otherwise than _well_. "At the outbreak of the rebellion, Dr. Crosby served in the provost-marshal's office at a great sacrifice for many months, attending to his practice chiefly at night. As years and honors accumulated, Dr. Crosby still continued his work, though his constitutional vigor was impaired by the severity of the New Hampshire winters, and by his unremitting labor. At length, having reached man's limit of three-score years and ten, he withdrew from active practice, and in 1870 resigned his chair in the college, to which his son succeeded. From that time it was plain that Dr. Crosby's life-work was nearly done. In his well-ordered and delightful home he found that rest to which his long service in behalf of humanity entitled him. His end was perfect dignity and perfect peace. "To those of us who had been most intimately associated with our departed friend, who had enjoyed his teachings, his counsels, and his generous kindness, the news of his death came as a heavy shock. But he still lives in the remembrance of his distinguished services, in the unfading affection and gratitude of his pupils, and in the many hearts whose burdens he has lifted. Verily, '_Extinctus amabitur idem!_'" Professor Crosby married Mary Jane, daughter of Stephen Moody, of Gilmanton, N. H. The following paragraphs relating to one of Dartmouth's most eminent professors, the esteemed classmate of President Bartlett, who says: "Outside of my own family circle, I had no better friend," are from the pen of Dr. T. A. Emmet, of New York.