CUNNINGHAM, C.D. & W. de W. ABNEY. The Pioneers of the Alps, London: Sampson Low, Marston, Searle, and Rivington, 1887, large 4°, number 31 of 50 copies on LARGE PAPER signed by Cunningham, photogravure portraits, plates and illustrations on India paper, mounted (occasional minor spotting), unopened in original maroon cloth (spine faded and repaired at head and foot, corners bumped).