London: Hodder and Stoughton, 1930. Original green cloth, with dust jacket.
First Edition of this tale of mystery and adventure, published a month before the American. As Buchan points out in a brief prefatory note, this tale contains further exploits of Dickson McCunn and several other characters whom he had introduced in HUNTINGTOWER (1922); there would be one more Dickson McCunn novel, THE HOUSE OF THE FOUR WINDS, in 1935.
This is a near-fine copy; the attractive pictorial dust jacket is just about near-fine, with quite minor soil and edge-wear. Blanchard A87. Item #12889