New York: Katanga Press, 1916.
Hardcover. Good. Second edition. 311 pp, illustrated with b/w plates. Ex-library, with stamps and bookplates on the endpapers, stamps on top and bottom edge. Old tape repair to title page, otherwise sound, with no markings in the text and minimal wear to boards. Introduction by Bishop J.C. Hartzell. Springer and his wife spent 14 years as missionaries in central Africa.