In 1797–98, during a second trip east, Little Turtle met with President John Adams. President Thomas Jefferson also corresponded with Little Turtle to encourage the introduction of American agriculture to Miami society, although it was Moravian missionaries who demonstrate farming methods to native tribes in the White River area and an East Coast Quaker society from Baltimore, Maryland, who sent Philip Dennis to work with tribes in Fort Wayne to establish a model farm. Little Turtle also made two trips to Washington, D.C., in 1801–02 and 1809–09 to meet with President Jefferson. At the request of Little Turtle and other chiefs, Jefferson provided agricultural equipment and livestock to the Miamis and Potawatomis in an effort to encourage the tribes to adopt farming. Despite these efforts, among others, most of the attempts at assimilation failed, a contributing factor to the federal government seeking further land cession treaties and the eventual removal of the territory's Native American inhabitants from the Northwest Territory. A lifelong teetotaler, Little Turtle made a personal plea to President Jefferson to prohibit the sale and consumption of alcohol in Native American communities. On 14 January 1802 he delivered a speech to President Thomas Jefferson and members of the US Senate: Father, nothing can be done to advantage unless the Great Council of the Sixteen Fires, now assembled, will prohibit any person from selling spirituous liquors among their red brothers. The introduction of this poison has been prohibited in our camps but not in our towns, where many of our hunters, for this poison, dispose of, not only their furs, etc., but also their blankets and guns, and return to their families destitute...Owing to the introduction of this fatal poison, we have become less numerous and happy. Jefferson and members of Congress were impressed with Little Turtle's arguments, and on 30 March 1802, Congress passed the revised Indian Nonintercourse Act. This and other federal laws restricting the sale of alcohol to Native Americans remained in effect until 1953. In 1809, Little Turtle suffered a break with other Miami leaders when William Henry Harrison, governor of the Indiana Territory, came to Fort Wayne to renegotiate treaty terms. Working with Little Turtle and his son-in-law, William Wells, Harrison succeeded in obtaining the Treaty of Fort Wayne (1809), which secured of land for the federal government from the Potawatomi representatives and other tribes who cooperated. Other tribal leaders who opposed Little Turtle,