Cree language
In his later years, he also worked diligently to finish his translation of the Bible into the Cree language, and also Ojibwa, Inuktitut, Chipewyan, and Norwegian (the language of some Hudson's Bay Company employees). Horden wrote several books and his "A grammar of the Cree language, as spoken by the Cree Indians of North America" (London, 1881) is considered one of his most significant linguistic achievements.