Sir William Drummond Macdonald Paton (1917 –1993), always known as Bill Paton, was an English physiologist, pharmacologist and Fellow of the Royal Society, considered by many to be one of the world’s greatest pharmacologists. He was responsible for discovering two new classes of drug that acted on nicotinic acetylcholine receptors. His theorised multiple types of nicotinic receptor (confirmed in the 1970s) formed the foundation of the development of Decamethonium, the first specific neuromuscular blocking drug and Hexamethonium, the first drug that specifically and safely lowered blood pressure. Paton was also charged with finding the solution to the problem of convulsions suffered by deep-sea divers if they went more than 200ft below sea-level, having discovered that the high pressure causing the convulsions could be reversed with anaesthetics. He was awarded a CBE in 1968 and knighted in 1979 for his work. Paton not only made countless discoveries but was also heavily involved in numerous public committees and had a special interest in the history of medicine. He made a substantial donation to The Society that founded the Paton Prize Fund for historical research on physiology and physiologists. Paton was Honorary Director of the Wellcome Institute for History of Medicine from 1983 to 1987. Sir William Drummold Macdonald Paton died on 17 October 1993. In 1994, The Physiological Society introduced the Paton Prize Lecture, this annual lecture commemorates Paton’s support and initiatives for promoting interest in the history of scientific experiments and ideas.