“In the late 1820's, Antoine and probably Louis set up a trading agency in Taos, for the centrality of its location and as a means of circumventing the customs office a hundred miles away in Santa Fe. After 1824, and for a period of about six years, the trade, though fluctuating, continued to increase. However, in the year 1830 a recession set in. The import tax steadily increased, while the price of trade goods dropped off. From the 1830's onward, the fur trade steadily declined, and with this decline, the Robidoux's shifted the focus of their activities and interests away from Santa Fe/Taos and more towards the Robidoux posts in the intermontaine corridor. After this date, he appears to have taken up a more permanent residence in Santa Fe, and to not have continued his sojourning in trapping and trading expeditions.
Louis appears in the account books of Manuel Alvarez buying supplies in 1829. In 1829, he also applied along with his brother Antoine for Mexican citizenship and was granted naturalization by the Mexican authorities a day later, on July 17th, 1829. He became Don Luis Robidoux. They are credited with this act in order to circumvent the customs taxes levied on foreign traders - marriage also gave them other distinct advantages in local society. http://www.lewismicropublishing.com/Publications/Robidoux/RobidouxLouis.htm.
“Louis probably served as the New Mexico agent for these posts, for they depended on New Mexico for supplies . . . On at least one occasion, in the spring of 1841, Louis Robidoux made the long journey to Fort Uintah . . . as he approached the Green River, he took the time to inscribe his name on a cliff in the Willow Creek drainage, some thirty-five miles south of [present-day] Ouray, Utah . . . The inscription reads:
If you can find this book I highly recommend it not only for the information about historic inscriptions, but also about a fascinating period in the early exploration and settlement of the West. Thank you Jack!