[16] Frobenius, Voice of Africa, 180.

[17] Ibid., 360.

[18] Ibid., 388.

[19] Roth, Great Benin, 86.

[20] Ibid., 82.

[21] Roth, Great Benin, 128.

[22] Ibid., 129.

[23] Ibid., 217.

[24] Lugard, A Tropical Dependency.

[25] Ripley, Races of Europe.