David Bacon (1729-1809), the son of John Bacon, was a Philadelphia hatter and a Quaker elder who visited Canandaigua, New York in the fall of 1794 to be present at a treaty with the Indians of the Six Nations. Bacon married Mary Trotter, the daughter of Joseph Trotter in the Philadelphia Monthly Meeting in 1751.The couple had six children; Susan P., Joseph, Charles W., Edmund P., Mary, and Anna Bacon.
Prior to the creation of Indian Committees for the Yearly Meetings of Philadelphia, Baltimore, and New York, the Meeting for Sufferings of Philadelphia was informed that the Indians desired Quakers to be present at the treaty of the Six Nations of New York at Canandaigua, and as a result, the Meeting sent David Bacon, William Savery, John Parrish, and James Emlen to attend the treaty.
The Treaty at Canandaigua, concluded on November 11, 1794, determined the territory to be left to the tribes of the Six Nations, who had fought against the colonies in the American Revolutionary War. The Six Nations, also known as the Iroquois, included the Mohawks, the Oneidas, the Onondagas, the Cayugas, the Senecas, and the Tuscaroras.