No two nations have ever had more intimate relationships than the United States and Great Britain. Speaking the same language and owning a common racial origin in large part, they have traded with each other and in the same regions, and geographically their territories touch for three thousand miles. During the nineteenth century the coastwise shipping of the United States was often forced to seek the shelter of the British West Indies. The fisherfolk of England and America mingled on the Grand Bank of Newfoundland and on the barren shores of that island and of Labrador, where they dried their fish. Indians, criminals, and game crossed the Canadian boundary at will, streams flowed across it, and the coast cities vied for the trade of the interior, indifferent to the claims of national allegiance. One cannot but believe that this intimacy has in the long run made for friendship and peace; but it has also meant constant controversy, often pressed to the verge of war by the pertinacious insistence of both nations on their full rights as they saw them. The fifteen years following Adams's encounter with Canning saw the gradual accumulation of a number of such disputes, which made the situation in 1840 exceptionally critical. Great Britain was angered at the failure of the United States to grant her the right to police the seas for the suppression of the slave trade, while the United States, with memories of the vicious English practice of impressment before the War of 1812, distrusted the motives of Great Britain in asking for this right. Nearly every mile of the joint boundary in North America was in dispute, owing to the vagueness of treaty descriptions or to the errors of surveyors. Twelve thousand square miles and a costly American fort were involved; arbitration had failed; rival camps of lumberjacks daily imperiled peace; and both the Maine Legislature and the National Congress had voted money for defense. In a New York jail Alexander McLeod was awaiting trial in a state court for the murder of an American on the steamer Caroline, which a party of Canadian militia had cut out from the American shore near Buffalo and had sent to destruction over Niagara Falls. The British Government, holding that the Caroline was at the time illegally employed to assist Canadian insurgents, and that the Canadian militia were under government orders justifiable by international law, assumed the responsibility for McLeod's act and his safety. Ten thousand Americans along the border, members of "Hunters' Lodges," were anxious for a war which would unleash them for the conquest of Canada. Delay was causing all these disputes to fester, and the public mind of the two countries was infected with hostility.