I have just uncovered what appears to be fan-art from the earliest known Abraham Lincoln / George Washington slash fiction!
"The Apotheosis of Lincoln", a silver etching by an unknown artist, circa 1860
"Oh George," Abe whispered breathlessly, gazing rapturously into the white-haired president's stormy gray eyes, "I've waited for this so long."
"So have I, Abe," George murmured sexily, and smiled like the sun, revealing his finely carved wooden teeth. "Now let me take you to Heaven..."