A. J. Ayer to Harrod, 2 December 1933: Text of two letters in which Ayer lays out his thoughts on verification.
Columbia Encyclopedia: Ayer, Sir Alfred Jules: Biographical paragraph.
Did Atheist Philosopher See God?: Article by William Cash, recounting an attending physician's account of Ayer's near-death in 1988.
FOLDOC: Ayer Alfred Jules: Concise entry from this philosophical database.
Language Truth Logic and God: Excerpt from Ayer's 1946 Language Truth and Logic.
The Brains Trust: Ayer's description of his experience with this 1950s TV panel discussion show.