The Great Rift Valley Being the Narrative of a Journey to Mount Kenya and Lake Baringo. Half blue leather with gilt titles and gilt decorations . Marble endpapers. Dulwich college motif on front in gold and presentation label inside. Bright copy in attractive binding Important exploration expedition in the hitherto unknown highland regions of Mt. Kenya. 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'. Smart copy.