Alfred St Hill Gibbons,
1911 Encyclopædia Britannica, Volume 3…
(1911)
“ Slaves might own slaves who in their turn might own slaves, the highest grade always being directly responsible to some Barotse chief. As a reward of gallantry or ability the paramount chief occasionally conferred chief’s rank on individuals not of Barotse birth, and these ipso facto assumed the name and privileges of the Barotse. ”
