PHILBY, Harry St. John Bridger. The Heart of Arabia, London: Constable, 1922, 2 volumes, 8°, FIRST EDITION, plates (spotting, mainly to titles and first few leaves of both volumes, pages 63-67 and 2 plates of first volume with tears crudely repaired with adhesive tape), original green cloth (a little rubbed); Arabia of the Wahhabis, London: Constable, 1928, 8°, FIRST EDITION, plates, original green cloth; The Empty Quarter, being a Description of the Great South Desert ..., London: Constable, 1933, 8°, FIRST EDITION, plates, original green cloth (extremities bumped). (4)