A great surgeon, born in Edinburgh; was demonstrator under Liston; was elected to the chair of Clinical Surgery in 1833; gave up the chair to succeed Liston in London in 1848, but returned a few months after; was re-elected to the chair he had vacated; he was much honored by his pupils, and by none more than Dr. John Brown, who characterised him as "the best, ablest, and most beneficent of men"; he wrote treatises and papers on surgery (1799-1870).