Andrew Jackson, President of the United States of America, to all and singular to whom these presents shall come, greeting : whereas a convention was made and concluded at Bellevue, Upper Missouri, on the fifteenth day of October, one thousand eight hundred and thirty-six, by and between John Dougherty, United States agent for Indian Affairs, and Joshua Pilcher, United States Indian sub-agent, being specially authorized therefor, and the chiefs, braves, head men, &c., of the Otoes, Missouries, Omahaws, and Yankton and Santee bands of Sioux, duly authorized by their respective tribes ..