He also showed how to count up to forty-eight million in Nahuatl, listed a number of Nahuatl words for metaphysical and moral concepts, pointed out that the Gospels and Thomas a Kempis's The Imitation of Christ had been translated into Nahuatl, acknowledged his debt to Indian writers such as Ixtlilxochitl, and catalogued authors both European and American born who had written in American languages ranging from Tarahumara to Cakchiquel.