 He ministered there with many of the same problems until 1679 when he was transferred to Caughnawaga near Montreal.By 1691, his understanding of the Mohawks had been recognized by Governor Frontenac and from 1693 to 1698, he held the position of the superior of the Canadian mission.From his years of experience with the Iroquois, he became a skilled negotiator and also contributed extensively to the written Mohawk language producing a grammar, a catechism and a prayer-book in Mohawk.