Answer
Frank Ramsey was a member of the Cambridge Apostles. The Apostles was a secret society of young intellectuals and aesthetes at Cambridge University in the late 19th and early 20th centuries. The group included many of the most influential thinkers of the time, including Bertrand Russell, G.E. Moore, Ludwig Wittgenstein, and J.M. Keynes. Ramsey was a member of the Apostles from 1911 to 1914.