Note 716 — Chapter XV · THE FIRE-DRILL
Reading edition
J. Hahn, “Das Land der Herero,” Zeitschrift der Gesellschaft für Erdkunde zu Berlin, iii. (1868) pp. 200, 213, 214 sq.; C. J. Andersson, Lake Ngami, pp. 218, 221; id., The Okavango River (London, 1861), pp. 21 sq.; H. Schinz, op. cit. p. 182.