Sorry, forgot about that!
From Wikipedia (Since I just learned of this myself!):
The Carlisle Peace Commission was a group of British negotiators who were sent to North America in 1778, during the American War of Independence. The commission carried an offer of self-rule to the rebellious colonies, including Parliamentary representation within the British Empire. The Second Continental Congress, aware that British troops were about to be withdrawn from Philadelphia, insisted on demanding full independence, which the commission was not authorised to grant. The Peace Commission marked the first time the British government formally agreed to negotiate with Congress; a previous informal attempt at negotiation took place in 1776.