Peter Mark Roget (1779-1869) was a British physician and savant.
His Thesaurus of English words and phrases, 1852.
British biographical archive online, 6 June 2012 (Peter Mark Roget, M.D., F.R.S., born London 19 January 1779; died West Malvern September 12, 1869; physician, savant; in later years composed a thesaurus)
Outlines of physiology, 1839: t.p. (P.M. Roget, M.D.)