E.W. Whitaker to Joshua L. Chamberlain 1901
In the 1901 speech Not a Sound of Trumpet
given only a few days after the date of this letter, Chamberlain
includes the information that Whitaker provided in this letter.
In his next speech in 1903 called Appomattox
Chamberlain would describe another flag of truce arriving
before Whitaker's. Chamberlain's source for this new information was the 1902 investigations done by the 155th Pennsylvania seen in their history Under the Maltese Cross
The "the statements of General Gordon early, or late" seen on page 5 refers to Gordons speech, Last Days of the Confederacy.
See also Whitaker's 1896 account The White Towel of Appomattox.