Specimens of Bushman Folklore, by W.H.I. Bleek and L.C. Lloyd, [1911], at sacred-texts.com

THE SHAPED RIB BONE.

A bone (it) is; a rib (it.) is; a Bushman is the one who makes it.[1] He works it; he shapes it with a knife.

"Kambro" is that which we eat (with) it.

[1. He works two ribs, with a knife.]