Africa.- Gregory (John Walter) The Great Rift Valley: being the Narrative of a Journey to Mount Kenya and Lake Baringo, first edition, 1896; The Foundation of East Africa, first edition, 1901 (2)

Africa.- Gregory (John Walter) The Great Rift Valley: being the Narrative of a Journey to Mount Kenya and Lake Baringo, first edition, colour frontispiece, 20 plates, illustrations, 2 folding maps, small hole to front free endpaper, original cloth, gilt, rubbed, slight bumping to spine extremities, [Czech p.67], 1896; The Foundation of East Africa, first edition, frontispiece, plates, 2 folding maps, browning, occasional spotting, cracked hinges, original decorative cloth, rubbed, 1901; 8vo (2)