This was a paper read before the Gloucester Medical Society in 1788, but not published until 1799. Largely confirming the earlier work of Heberden on the condition, Parry stated his conclusion that disease of the coronary arteries is the responsible factor in angina pectoris (which he called “syncope anginosa”). He was the first to observe the slowing of the heart rate folowing pressure on the carotid artery.