The Library of Congress Makes Thousands of Fabulous Photos, Posters & Images Free to Use & Reuse
" Need photographs of Abraham Lincoln—and scans of his speeches, letters, and “dueling instructions”—for that book you’re writing? You’re covered with this gallery. Need a collection of classic children's books for your website (or your reading pleasure)? Here you go "
Source: Open Culture, November 2, 2018, http://www.openculture.com/2018/11/library-congress-makes-thousands-fabulous-photos-posters-images-free-use-reuse.html