Specimens of Bushman Folklore, by W.H.I. Bleek and L.C. Lloyd, , at sacred-texts.com
A bone (it) is; a rib (it.) is; a Bushman is the one who makes it. 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.]