However, the commissioners were unable to agree on where the border should go upon exiting the channel between St. Joseph and St. Tammany. This question would wait another 20 years until the 1842 Webster–Ashburton Treaty finally established the boundary "along the ship channel between Saint Joseph and St. Tammany Islands, to the division of the channel at or near the head of St. Joseph's Island ; thence, turning eastwardly and northwardly, around the lower end of SE George's or Sugar Island" so as to assign Sugar Island to the United States.