From Diary of the American Revolution, Vol II. Compiled by Frank Moore and published in 1859.
A junto is formed at Philadelphia, and said to consist of Generals Mifflin, Thompson, Arnold, and Sinclair; their object is the removal of General Washington from the chief command of the rebel army. The Generals Lee and Gates, with all the Yankees who have resolution enough to declare themselves of a party, wish well to this enterprise. About twelve months ago a motion for superseding General Washington was carried by only one voice.1
1 Rivington’s Royal Gazette, December 19.