The Treaty of Paris had set the 45th parallel within the northern border of present-day New York and Vermont. Most of the border had already been measured in the early 1770s, but the line of inquiry was imprecise. As “Fort Blunder” – an unnamed American fort in present-day Northeast New York – had been built north of the 45th parallel, the United States wanted to follow the old survey line, and the Webster-Ashburton Treaty included this change, leaving the semi-finished fort on American soil. After the contract was signed, the United States resumed construction on the site. The new project replaced the abandoned construction of the 1812 era with a massive fortification of the third system, known as Fort Montgomery.  The traditional merchants` route left the lake at Grand Portage and crossed the land to the dove, this river and a tributary on portage height and from there the tributaries of the Rainy River to Lac La Croix, Rainy Lake and River and Lake of the Woods. Finally, this is the path that the Treaty has described as a border.  While Webster and Ashburton agreed to call for a definitive end to the slave trade on the high seas, they agreed to pass the creole fall of 1841 in the Caribbean, which was then controversial. In November 1841, a slave revolt over the American Creole brigade, part of the coastal slave trade, forced the ship to Nassau.
Officials in the Bahamas eventually emancipated the 128 slaves who decided to stay in Nassau, as Britain abolished slavery in its colonies effective 1834.  The United States first demanded the return of slaves and then compensation. An agreement was reached in 1855 as part of a much larger claim contract of 1853, covering the claims of both nations until 1814. As a result of the Webster-Ashburton agreement, the United States gave 13,000 sq km of controversial area along the Maine border, including the Halifax-Québec highway, but held 18,000 sq km of controversial wilderness.  In addition, the United States received 17,000 km2 of land along the Minnesota-Canada border, including the Mesabi Range.  Shortly after the ratification of the Webster-Ashburton Treaty, the Ojibwa Nation ceded on the south shore of the upper lake landansieden states in the Treaty of La Pointe. However, the news of ratification of the international treaty did not reach any of the parties negotiating the surrender of the land. The Grand Portage Band was mistakenly struck off from the Ojibwe Contracts Board.
In addition, the Grand Portage Band was misinformed of the details of the Treaty of Paris; They believed that the border crossed the centre of Lake Superior to the St. Louis River and placed both Isle Royale and his group on British territory. The Treaty of Paris expressly takes note of the Royal Island, as in the territories of the United States. Subsequently, the Royal Isle Agreement was signed in 1844 between the United States and the Grand Portage Band as a contracting party to the Treaty of La Pointe, and other Ojibwa tribes confirmed the treaty. The treaty specified the canal that would follow the boundary between Lake Huron and Lake Superior and assigned Sugar Island to Section 10 of the Webster-Ashburton Treaty, which identified seven crimes under extradition: “Murder or attack with intent to commit murder, or piracy, arson, theft or forgery, or the expression of false paper.” There was no slave revolt or mutiny.