527531 Blood letting: physician bleeding a patient from the arm. 1596 (woodcut from a translation by Sir John Harrington of a 12th or 13th century poem based on the Salernian Rule of Health and published 1596); (add.info.: \'To bleed doth cheer the pensive, and remove/The raging fires bred by burning love.\'); Universal History Archive/UIG; out of copyright.