Mezue ahịrịokwu na-esonụ: N'afọ 1852, Ackermann's bipụtara otu nnukwu ihe osise lithographs nke na-egosi
Agha Kaffir. Ọzọkwa, Martens mepụtara isi ihe osise maka efere ọ bụla nke Harris pịrị, mana na nke a, isi mmalite bụ Captain George Jackson Carey nke Cape Mounted Rifles onye nyere onye na-ese ihe eserese; Thomas Baines nyere eserese ọzọ. Ọ bụ ezie na ihe osise ndị a na-akpali akpali na-akọwa agha ndị ọchịchị na-alụ, o yighị ka Martens ò nwetụla ahụmahụ nke ịlụ ọgụ n'onwe ya.