Letter to his mother, in [Lorien Foote, The Yankee Plague: Escaped Union Prisoners and the Collapse of the Confederacy, https://books.google.com/books?id=d4kwDAAAQBAJ&pg=PA14, 5 October 2016, University of North Carolina Press, 978-1-4696-3056-4, 14–]
Famous Charles P. Mattocks Quotes
Read before the Maine Historical Society February 14, 1901, at [Third Series, Vol. I, http://archive.org/stream/collectionsofmai11lcmain/collectionsofmai11lcmain_djvu.txt, Maine Historical Society, 10 April 2018, 1904]
Speaking of the 17th Main Volunteer Infantry Regiment in a letter to his mother, in [Kanisorn Wongsrichanalai, Northern Character: College-Educated New Englanders, Honor, Nationalism, and Leadership in the Civil War Era, https://books.google.com/books?id=cFMnDAAAQBAJ&pg=PA160, 2016, Oxford University Press, 978-0-8232-7181-8, 160–]