Bertrand Russell
"You could tell by his [Aldous Huxley] conversation which volume of the Encyclopaedia Britannica he'd been reading. One day it would be Alps, Andes and Apennines, and the next it would be the Himalayas and the Hippocratic Oath." (Source: Parris, M., Scorn: With Added Vitriol, London: Penguin, 1996, quoting Russell's 1963 letter to Ronald W. Clark)