The trouble with Chimneys: from Percival Potts to Archibald Leitch 23 Dec 2020 What, you might ask, could possibly connect Percival Potts, surgeon at St Bartholomew’s hospital in the 1770s, with a pathologist a hundred years ago? The answer is that it is something to do with soot, sweat and scrotums. And chimneys. Find out more Show/Hide