By June 1838, Jean Baptiste Beaubien, a veteran trader in Chicago, and John P. Bradstreet had become partners with Mack and began selling lots in Pecatonic. Mack made out very well in the 1837 treaty between the government and the Winnebago, and in 1839 he used some of the money he received to build a two-story frame house with a cellar. This house survives in what is now the Macktown Forest Preserve. The Talcotts lived north of the river where they dug a millrace and built a gristmill. They preferred to call the settlement Rockton, which eventually became the name of the village.