André's report to his sovereign, whom he rejoined in 1251 at Caesarea in Palestine, appears to have been a mixture of history and fable; the latter affects his narrative of the Mongols' rise to greatness, and the struggles of their leader Genghis Khan with the mythical Prester John, and in the supposed location of the Mongols' homeland, close to the prison of Gog and Magog. On the other hand, the envoy's account of Mongol customs is fairly accurate, and his statements about Mongol Christianity and its prosperity, though perhaps exaggerated (e.g. as to the 800 chapels on wheels in the nomadic host) are likely factual.