In 1859 the Liberal government had rescinded the grant, and this had added one more grievance to those which the Swiss banker had brought up against the administration of Juarez. No sooner had Sonora sent in its adhesion to the empire than Jecker proposed to the French government to make over his rights against a payment of two million dollars. The plan was then to colonize Sonora and Lower California, establishing, on behalf of France, a right to exploit the mines. The climate was healthful, the land rich, the adventure tempting; but it had the great drawback of running foul of the most acute Mexican susceptibilities. Not only did such pretensions at that time excite the suspicions of the Mexicans with regard to the disinterestedness of the French alliance, but they were calculated to give umbrage to the United States government. As early as 1863, Napoleon III had discussed the possibility of establishing in Sonora* a colony which should develop the mining and agricultural wealth of the state. In exchange for a grant of unclaimed national lands, these colonists were to pay a percentage of their proceeds to France, as well as a tax to the Mexican government. * Chihuahua, Durango, and Sinaloa eventually were also included in the scheme. A colony of armed Confederates, inimical to the Federal government of the United States, established between its dominions and the heart of the Mexican empire, and backed by France, Austria, and Belgium, must form a formidable bulwark in case of trouble between Mexico and its Northern neighbor. There is small doubt that some such plan had formed a part of the original "deal" proposed by Jecker to the French leaders. In the spring of 1864 unauthorized attempts had been made by Californian immigrants to land at Guaymas and settle upon certain lands granted them by President Juarez. The marshal had sent French troops to protect the province from such inroads, treating these intruders as squatters. This had furnished a reason for the military occupation of Sonora; thus was the first step taken in the realization of the project. Such was, in rough outline, the position of the Sonora colonization question when Dr. Gwin entered upon the scene. Upon his arrival in Mexico, he applied at headquarters for an audience. The marshal, although in full sympathy with the project, realized the danger of its open discussion at that time. Maximilian and his advisers were opposed to it. Much tact and secrecy seemed, therefore, necessary in the conduct of negotiations having for their object the furtherance of so unpopular a scheme. Dr. Gwin was too conspicuous a figure to pass unnoticed the portals of the French headquarters. An informal interview was therefore arranged.