Though published as part of a licensed Edgar Rice Burroughs franchise, this original series was owned by Western.
The feature was created by writer Gaylord Du Bois and artist Jesse Marsh in Tarzan #25 (1951), and ran continuously through #156 (1966).
Before he died, Marsh did illustrate Jon of the Kalahari, a Korak back-up feature created and written by Gaylord Du Bois.
A new back-up feature, created and written by Du Bois, "Jungle Girl", illustrated by Dan Spiegel, replaced Brothers of the Spear.
An additional story, "Treachery in Aba-Zulu" (illustrated by Manning), had appeared in Dell Giant #51 (Tarzan, King of the Jungle) in 1961.
The 12 page story, "Treachery in Aba-Zulu", in Dell Giant #51, has been reprinted three times (per Grand Comics Database online), but not in the United States.