Macdonald, John. Interview with Valentine, "The Messrs." (1846). Experiencing the Neutral Ground of the American Revolution: The McDonald Interviews, WCHS item 536. Transcription courtesy of the Westchester County Historical Society (No copyright - United States).

- Hufeland Index Page 448 - The Messrs. Valentine, of Valentine's Hill: "When General Washington left Valentine's hill for White Plains, the British advanced guard was in sight, and the officers compelled him to mount." The Messrs. Valentine, of Valentine's Hill: "When General Washington left Valentine's hill for White Plains, the British advanced guard was in sight, and the …