 In his first year as an undergraduate, Ramsey had met and befriended R.B. Braithwaite, then a mathematics undergraduate a year ahead of him. Braithwaite introduced Ramsey to J.M. Keynes, the economist. Ramsey was soon after elected to the Cambridge Apostles, the secret debating society of which Braithwaite and Keynes were both active members. Ramsey attended Keynes’ economics lectures and they discussed Keynes’ Treatise on Probability (1921). Ramsey’s criticisms appeared the following year in a review of Keynes’ book for Ogden’s journal, The Cambridge Magazine (1922); Keynes had maintained that probability is an objective relation between propositions but Ramsey denied we perceive such relations nor grasp them intellectually. After his finals, Ramsey turned to writing a critical notice for Mind of Wittgenstein’s Tractatus (1923). Ogden had written to Wittgenstein suggesting that he meet with Ramsey and Ramsey duly went to Puchberg, near Vienna, in September 1923 to spend a fortnight with Wittgenstein working through the Tractatus with him. In 1924 Ramsey spent 6 months in Vienna being psychoanalysed, during which time he met Moritz Schlick and Hans Hahn, both members of the Vienna Circle. He returned to Cambridge in October 1924 where he had been appointed as a Fellow In Mathematics at King’s College, where Keynes, also a Fellow, had pushed for Ramsey’s appointment. At a meeting of the Moral Sciences Club that December, Ramsey met his future wife, Lettice Baker; they married in 1925 and had two daughters together.