DRUMMOND, Henry. 17726 Autograph Letter Signed, presenting his correspondent with “the cheap edition of Baxter” for his class. 2 pp. 7 x 4½ inches, in good condition. 3 Park Circus, Glasgow, 20 January 1892. Henry Drummond (1851-97), Scottish theologian and biologist, author of Natural Law in the Spiritual World (1883). In June 1883 he set out for Africa to make a scientific and geological exploration of the Lake Nyasa and Lake Tanganyika regions. His journals later became the book, Tropical Africa (1888).