The Bogo Matassalai were a tribe located in Africa.
Some time in history, the Bogo Matassalai found perfect harmony, living with their neighbours, the Minimoys.
During the time in which Archibald Suchot was in Africa, he helped build the Bogo Matassalai an irrigation system, in return for a big bag of rubies.
When Arthur decides to venture down in to the world of the Minimoys, the tribe assist him in doing so. The leader denies any other help from the tribe, as Arthur's heart is "the strongest of weapons".
They later help Arthur and Archibald return from the land of the Minimoys, and then dine with them.