Reaching the wondrous city, which his biographer aptly calls "the modern Babel, with the confusion of tongues," Gaston, with a manliness little to be expected in one of his training, betook himself to the stern duty of earning a livelihood by hard labour. He tried fishing, which barely earned him bread. As a lighterman he did better, until the building of a wharf ruined his business. A speculative enterprise for importing cattle from Lower California proved "more picturesque than profitable." At this juncture when, in his own words, "a gendarme would have charged on me at full gallop," so wretched was his appearance, his friend, M. Dillon, the French Consul at San Francisco, procured him letters of introduction to Señor Arista, President of Mexico, and Gaston repaired to the capital of that country, full of enthusiasm. The banking-house of Jecker, Torre and Co. acting as agents of the Government, signed a contract with Gaston, whereby the latter pledged himself to land at Guaymas, in Lower California, a company of five hundred French immigrants, armed and equipped for military duty, ostensibly and immediately for the protection of the Restauradora Mining Company against the incursions of the Arizona Indians, but really intended to serve as the nucleus of an extensive French colony, to be used as a barrier against the supposed encroachments of their American neighbours. Already the expansion of the United States in the direction of Mexico and the Pacific coast had aroused the jealousy of Europe. There is no doubt that Gaston's scheme for the protection of Mexico, befriended as it was by the representative of France in California and the French minister in Mexico, M. Levasseur, was not without substantial aid from the home government. The banker Jecker played a leading part, years afterwards, in the ill-starred attempt of Napoleon III. to found an empire in Mexico.