Published many, many books, but I am only interested in those set in Africa.
Herbert Strang was the pseudonym of two English authors, George Herbert Ely (1866–1958) and Charles James L'Estrange (1867–1947). They specialized in writing adventure stories for boys, both historical and contemporary to their day.
Both men were staff members of Oxford University Press, which published their books.
The pseudonym was also employed for several series of anthologies, works "edited by Herbert Strang" that included The Big Book of School Stories for Boys and The Oxford Annual for Scouts. There was also an anthology series for girls by "Mrs. Herbert Strang," who was also given as the author of some adventure books for girls.