According to Hiram W. Beckwith, the Potawatomi were the most populous tribe between the lakes and the Ohio, the Wabash and the Mississippi. Their debouch upon the plains of the Illinois has already been mentioned. This was about the year 1765. The confederacy among them, the Kickapoos and the Sacs and Foxes, resulted in the extermination of the old Illinois tribes, and after that extermination, the Kickapoos took possession of the country around Peoria and along the Vermilion river, the Potawatomi of eastern and northern Illinois, while the Sacs and Foxes went farther to the west. After the treaty of Greenville in 1795, the Potawatomi rapidly absorbed the ancient domain of the Miamis in northern Indiana, swiftly pressing them back to the Wabash, and usurping the major portion of the small lake region in the north end of the state. They had now become so haughty and insolent in their conduct as to refer to the Miamis as "their younger brothers," and the Miamis, by reason of their long wars, their commingling with the traders, and their acquisition of degenerate habits, were unable to drive them back. In 1810 and 1811, Tecumseh and the one-eyed Prophet were eagerly seeking an alliance with their treacherous chiefs. A demand was made upon Tecumseh for the surrender of certain Potawatomi murderers and horse thieves who had invaded the Missouri region and committed depredations, but Tecumseh replied that he was unable to apprehend them, and that they had escaped to the Illinois country. The Potawatomi were now living in mixed villages west of the present sites of Logansport and Lafayette, and the southern limits of their domain extended as far down the Wabash as the outlet of Pine creek across the river from the present city of Attica. [Illustration: Shaubena, the best of the Potawatomi Chiefs, and a follower of Tecumseh. By Courtesy The Chicago Historical Society]