Canadian-born physician and researcher (1849-1919) who was a founding professor of Johns Hopkins Hospital, widely regarded as the 'Father of Modern Medicine' for his pioneering work in medical assessment, diagnosis, and education. Ink signature, "Yours sincerely, Wm. Osler,” on an off-white 3.75 x 1.75 slip. In fine condition, with a small rusty paperclip impression to the top edge.
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