William Butter - Doctor of Medicine
Married (1767) to Catherine Douglas, a cousin of James Boswell. Sometime physician at Derby.
According to James P. Warbasse in the article "Doctors of Samuel Johnson and his Court":
"[Dr. Butter] practiced at Derby till he acquired moderate fortune and then moved to London. He was the author of a number of treatises, and be came a licentiate of the Royal College of Physicians."1
Dr Butter was married to the daughter of Sir John Douglas, a first cousin of James Boswell. He is mentioned a few times in the Life of Johnson, and it was in connection with a visit by Johnson and Boswell to Dr Butter that the famous quote "We cannot tell the precise moment when friendship is formed..." was coined.