German doctor and politician (1821–1902), dubbed the “Father of Pathology,” who founded the field of social medicine. ALS in German, signed “R. Virchow,” one page, 4.25 x 5.5, March 24, 1898. Brief letter to physicist Franz Rudolf Paul Gruner. In full (translated): “Enclosed again a letter of mine. Do you recognize the man?” In fine condition, with scattered light creases. RRAuction COA.