{22} The Treaty of 1762 between France and Spain, having been concluded before the Treaty of 1763 between France and Great Britain, gave Spain a certain show of title to the territory between the Mississippi and the Perdido; but the Treaty of 1763, in which France ceded this same territory to Great Britain, was, as we have just seen, known first, and was the Treaty which France executed in respect to this territory. The conflict of claims between Great Britain and Spain, which was thus engendered, continued to be waged for twenty years, and was settled in the year 1783, in so far as these two powers were concerned, by the recession of Florida to Spain. In this same year, Great Britain recognized the independence of the United States, with a southern boundary extending from the point where the Mississippi River is intersected by the thirty-first parallel of latitude, along this parallel to the River Appalachicola, thence down the Appalachicola to its confluence with Flint River, thence on the line of shortest distance to the source of the River St. Mary, and thence by the course of this stream to the Atlantic. Spain thus held, as the result of these several treaties, all of the territory south of this line, unless England reserved in her recession of Florida that portion of Louisiana lying between the Iberville and the Perdido, ceded by France to Great Britain in the Treaty of 1763, and united by Great Britain with Florida. There is no evidence in the text of the Treaty of 1783 that Great Britain made any such reservation, or in the subsequent actions of the British Government. By the Treaty of St. Ildefonso, of October 1st, 1800, also a secret treaty, Spain receded Louisiana to France. The description of the territory thus receded was very vague. It reads in the official translation of the treaty, {23} "His Catholic Majesty promises and engages, on his part, to cede to the French Republic, six months after the full and entire execution of the conditions and stipulations herein relative to his Royal Highness the Duke of Parma, the Colony or Province of Louisiana, with the same extent that it now has in the hands of Spain, and that it had when France possessed it; and such as it should be after the treaties subsequently entered into between Spain and other states." There was here certainly opportunity for a dispute between Spain and France as to the correct boundary between Louisiana and Florida. France could claim with some reason the Perdido as the eastern boundary of Louisiana, and Spain could meet this with a counterclaim that, after the cession in 1763 of all Louisiana east of the Iberville and the Lakes to Great Britain, and its union by Great Britain with Florida, the line of the Iberville and the Lakes Maurepas and Pontchartrain was the eastern boundary of Louisiana.