Proof positive. 19th century, Library of Congress collection

"Don't talk to me, Maguire; I tell you education is a humbug. I had my son Tim taught writin' an' what's the result? Why, he's servin' a term for forgery. Whilst Dinnis, my other boy, who never had a day's schoolin' in his life, will run for office next election!" Caption from Harper's.
(DLC/PP-1933:0118).
Forms part of: Cabinet of American illustration (Library of Congress).
Published in: "Proof Positive," Harper's Weekly, 28:729 (Nov. 1, 1884).