CHILDERS, ERSKINE. The Riddle of the Sands. A Record of Secret Service Recently Achieved. Illustrated with 2 maps (one the folding frontispiece) and two charts. 8vo, original black cloth with vignette of a sail boat stamped in white on front cover, rebacked with original spine laid-down, spine lettering rubbed free, spots to front board; new endpapers, front hinge partially split, booklabel to front pastedown; cloth slipcase. London: Smith, Elder, & Co., 1903