,14=/,15=#,23=%,24==> Contents List of illustrations vii Preface ix 1Family Resemblances 1 2Childhood and Schooldays 24 3Engineering Studies 54 4Cambridge 1911{-12 73 5Cambridge 1912{-13 138 6Norway 1913{-14 179 7The War 1914{-18 204 8Captivity and Return 1918{-20 267 9Tractatus 1921{-22 296 Index 317