Meanwhile, Rolette's business continued to prosper. In 1820 Rolette made an alliance with Astor's powerful American Fur Company and became the company's sole agent in Prairie du Chien. This, coupled with numerous investments in real estate, propelled Rolette to become the wealthiest man in the village, and he was often called "King Rolette" by the American Indians with whom he traded. However, in 1826, Rolette's authority began to wane as Hercules L. Dousman arrived in Prairie du Chien to work for the American Fur Company. The two operated as equal partners for some time, but Dousman slowly came to rise past Rolette in the business.