Rougier returned home in the summer of 1926, but within months he was sent to the East African territory of Tanganyika. Heyer joined him there the following year. They lived in a hut made of elephant grass located in the bush; Heyer was the first white woman her servants had ever seen. While in Tanganyika, Heyer wrote "The Masqueraders"; set in 1745, the book follows the romantic adventures of siblings who pretend to be of the opposite sex in order to protect their family, all former Jacobites. Although Heyer did not have access to all of her reference material, the book contained only one anachronism: she placed the opening of White's a year too early. She also wrote an account of her adventures, titled "The Horned Beast of Africa", which was published in 1929 in the newspaper "The Sphere".