Reprint, first published 1921. xi, [i], 466,  pp. 1 vols. 8vo. Publisher's rust cloth. Some spotting and discoloration to cloth, slight bow to boards, in very good dust-jacket, chipped and creased at extremities, portion of blank front flap cut away. Item #316468
Reprint of Keynes' early work on probability, the subject of his Cambridge fellowship dissertation.