The knife and the stone.
D000715:Anatomy / Q000266:history; D004739:England; D049670:History, 17th Century; D049671:History, 18th Century; D049690:History, Ancient; D006801:Humans; D008488:Medical Illustration; D001744:Urinary Bladder Calculi / Q000266:history* / Q000601:surgery; D013520:Urologic Surgical Procedures / Q000266:history* / Q000379:methods