and the character of its inhabitants, they could see nothing impracticable in the plan of mustering and keeping together an army of fifteen thousand Indians. [Footnote: While the plan, as proposed in the memorial, was clearly impracticable, the subsequent experience of the French in Texas tended to prove that the tribes of that region could be used with advantage in attacking the Spaniards of Mexico, and that an inroad, on a comparatively small scale, might have been successfully made with their help. In 1689, Tonty actually made the attempt, as we shall see, but failed from the desertion of his men. In 1697, the Sieur de Louvigny wrote to the Minister of the Marine, asking to complete La Salle's discoveries, and invade Mexico from Texas.--_Lettre de M. de Louvigny_, 14 _Oct._ 1697, MS. In an unpublished memoir of the year 1700, the seizure of the Mexican mines is given as one of the motives of the colonization of Louisiana.] La Salle's immediate necessity was to obtain from the court the means for establishing a fort and a colony within the mouth of the Mississippi. This was essential to his own commercial plans; nor did he in the least exaggerate the value of such an establishment to the French nation, and the importance of anticipating other powers in the possession of it. But he needed a more glittering lure to attract the eyes of Louis and Seignelay; and thus, it would appear, he held before them, in a definite and tangible form, the project of Spanish conquest which had haunted his imagination from youth, trusting that the speedy conclusion of peace, which actually took place, would absolve him from the immediate execution of the scheme, and give him time, with the means placed at his disposal, to mature his plans and prepare for eventual action. Such a procedure may be charged with indirectness; but it was in accordance with the wily and politic element from which the iron nature of La Salle was not free, but which was often defeated in its aims by other elements of his character.