Na mgbakwunye, o nyèrè aka na ihe osise màkà White, Dyer & Sloane's 'The Succulent Euphorbieae' (1941), Meredith's ' The Grasses and Pastures of South Africa' (1955) na 'Flora of Southern Africa'.  Mgbè ọ mepụtara ma zụlite ezinụlọ, ọ laghachiri na National Herbarium n'etiti afọ 1958 na 1960, wee mepụta ihe osise iri asatọ na àtó nke ahịhịa maka 'Onye ahịhịhịa na South Africa' (1966), nsụgharị ọhụrụ nke Phillips es 'Onye Ahịhịa nke South Africa' (afọ 1939), mbipụta nke o nyekwara aka na ya. 
Na mgbakwunye, o nyere aka na ihe osise maka White, Dyer & Sloane's 'The Succulent Euphorbieae' (1941), Meredith's ' The Grasses and Pastures of South Africa' (1955) na 'Flora of Southern Africa'.  Mgbe o meputara ma zulite ezinulo, o laghachiri na National Herbarium n'etiti afo 1958 na 1960, wee meputa ihe osise iri asato na ato nke ahihia maka 'Onye ahihihia na South Africa' (1966), nsughari ohuru nke Phillips es 'Onye Ahihia nke South Africa' (afo 1939), mbiputa nke o nyekwara aka na ya. 