In 1744, Canassatego served as a speaker at meetings to negotiate the
Treaty of Lancaster.
Witham Marshe, a
Marylander in attendance, recorded the only written description of Canassatego: At the treaty conference were representatives of five of the Iroquois nations (except the Mohawk, the easternmost tribe), and the provinces of Pennsylvania, Maryland, and
Virginia. With
King George's War underway, the British colonies needed to cultivate a good relationship with their Iroquois neighbors, who might otherwise become French allies. After a speech by Canassatego, officials from Maryland and Virginia agreed to pay the Iroquois for land in their colonies, although they believed that the Iroquois had no legitimate claim to those lands. Virginia got the better part of the deal, however: although Canassatego and other Iroquois leaders believed that they had sold only the
Shenandoah Valley to Virginia, the official deed gave Virginia much more land than that. Near the end of the conference, Canassatego gave the colonists some advice: Canassatego was concerned that the British colonies lacked a coordinated policy to deal with the military threat coming from
New France. He made similar recommendations about colonial unity at another conference in 1745. His words became a central part of the Iroquois Influence Thesis, the controversial proposal that the Iroquois League was a model for the
United States Constitution. Canassatego was replaced by
Hendrick Theyanoguin as a 6, not 5, Nation diplomat who continued building alliances with Britain's Northern Colonies with his friend
William Johnson in 1754.
Hendrick Theyanoguin was killed fighting the French a year later. This work, begun by Canassatego and continued by
Hendrick Theyanoguin, progressed towards
Benjamin Franklin's introducing "
Short Hints towards a Scheme for a General Union of the British Colonies on the Continent" (1754), which became the prototype for the U.S. federal system declared in 1776. ==Final years==