John Walter Gregory

A first-edition copy of Gregory's important exploration expedition in the hitherto unknown highland regions of Mt. Kenya.

• John Walter Gregory (English).
• The Great Rift Valley, Being The Narrative Of A Journey To Mount Kenya And Lake Baringo With Some Account Of The Geology, Natural History, Anthropology, And Future Prospects Of British East Africa.
• London: Murray, 1896.
• 422 pages.
• Octavo.
• Includes a colored frontispiece, 20 full-page plates, 23 illustrations in text and two folding maps.
• Bound in modern blue polished half calf gilt.

In 1892, Gregory was seconded as naturalist to a large expedition to British East Africa; when this collapsed, he set out on his own with a party of forty Africans. In five months, he completed scientific observations in fields ranging from structural geology and physical geography to anthropology, and from mountaineering and glacial geology to the malarial parasites. His major success was the study in this region of the volcanic rocks and structural features of what he termed the "Great Rift Valley."