With Mobile commenced, the royal storehouses erected, and the alliance of the Choctaws and Chickasaws secured, Iberville felt that the colony of Louisiana was on a secure foundation, and on March 31st he sailed from Dauphine Island, then the headquarters of that colony for which he had done so much, and which he was destined never again to see. The domain of Louisiana, obtained by so much heroic endeavor and individual suffering on the part of Joliet, Marquette, La Salle, Tonti, Iberville, and their associates, passed at once, by an edict of Louis XIV., into a monopoly and under the control of a courtier, Anton Crozat, for trading purposes, by the decree of September 14, 1712. In this decree the limits of Louisiana were for the first time defined, including "all the territories by us (France) possessed, and bounded by New Mexico and by those of the English in Carolina.... The river St. Louis, formerly called the Mississippi, from the sea-shore to the Illinois, together with the rivers St. Phillipe, formerly called the Missouries, and the St. Jerome, formerly called the Wabash (the Ohio), with all the countries, territories, lakes in the land, and the rivers emptying directly or indirectly into that part of the river St. Louis. All the said territories, countries, rivers, streams, and islands we will to be and remain comprised under the name of the government of Louisiana." There was another and blacker page to the decree, whereby Crozat was further authorized to introduce African slavery: "If the aforesaid Sieur Crozat considers it advisable to have negroes in the said country of Louisiana, for agriculture or other use on plantations, he can send a ship each year to trade directly with the Guinea coast, ... and is further authorized to sell negroes to the settlers of Louisiana." But prior to this condition of affairs the great Canadian naval commander had passed to his final reward, having died of yellow fever at Havana, July 9, 1706. The last leaf in his history was, however, an effort, through his personal bravery and skill, to secure French domination in America by driving out of the Antilles the determined English seamen whose successful raids so often militated against the interests of France. Despite his health, undermined by fevers, Iberville left France with a fleet with which he hoped to carry out this great plan. Intending to make a descent upon Barbadoes, he learned that the English, warned of his plans, were prepared for him. He therefore seized on the islands of Nevis and St. Christopher, where his fleet captured an enormous amount of booty of all kinds. He decided next to ravage the English colonies in the Carolinas, but stopping at Havana for reinforcements he lost his own life by the epidemic which destroyed eight hundred others of his fleet.