 La Roche published an account of his voyage to and sojourn among the Neutrals, describing their country and their customs, and mentioning the oil he discovered.Gabriel Sagard and Chrétien Le Clercq reproduced it in their writings, in a more or less abridged form.La Roche's discovery of oil makes him a notable figure in the history of Western New York and Northeastern Pennsylvania, where he's typically called "De La Roche D'Aillon".