1926. Other volumes in this set include ISBN number(s): 0766176509. Volume 2 of 2. Mental Life. The author's aim in collecting all the material found in these volumes was twofold; scientific and practical. The life of a South African tribe is a collection of biological phenomena which must be described objectively and which are of great interest, representing a certain stage of human development. Mr. Junod's aim has been to present the Thonga tribe to a scientific and thorough study and shall be most gratified if it leads other observers to undertake the same investigation with regard to other African tribes. Illustrated.