[23] Quoted in Du Bois: _Timbuktu_.
[24] Von Luschan: _Verhandlungen der berliner Gesellschaft für
Anthropologie_, etc., 1898.
[25] Frobenius: _Voice of Africa_, Vol. I.
[26] Cf. p. 58.
[27] Keane: _Africa_, II, 117-118.
[28] _The Congo_, I, Chap. III.
[29] Harris: _Dawn in Africa_.