*It is likely that the most important service performed by Keynes in 1919—he was the Treasury's representative on the British team—was to take a short manuscript from a prison camp at Monte Cassino via his diplomatic pouch to Bertrand Russell in Cambridge. This was the immortal Tractatus Logico-Philosophicus, written by Ludwig Wittgenstein in notebooks he carried during the war. Wittgenstein had enlisted in the Austrian army at the outset of the war, served on the eastern front and in the Tyrol as an artilleryman, and been taken prisoner by the Italians in November of 1918.