Annotation
[1] Copy, DNA WR RG 107, Secretary of War, Letters Received, P 198, Register notation. Although Lincoln's original note has not been located, the copy preserved in the register indicates that Lincoln referred to a statement of First Lieutenant Frank E. Yates, Company D, Ninth Excelsior. Other records show Frank E. Yates as an officer in the Seventy-third New York Volunteers, which was known as the Fourth Excelsior Regiment.