Sir Patrick Manson (1844-1922) Plaster Plaque by J.R. Pinches, this portrait bust was used as the obverse design for the Royal Society of Tropical Medicine and Hygiene prize medal first awarded in 1923. Sir Patrick Manson was a Scottish physician who made important discoveries in parasitology, and was the founder of the field of tropical medicine field plaster plaque framed, overall size 41cm sq.