There is a photograph of the painter who painted the famous portrait of Pres G. Washington. Our time scale is kind of compressed, too.
Do a Google
Lew Wallace
Edwin Booth (yes, John Wilkes brother)
Robert Todd Lincoln
Interesting tie ins.
Not the least of which is the headline "Booth Saves Lincoln"
It involves Mark Twain, The Players Club (no, not that Players Club), President Grant, The Sultan of the Ottoman Empire, Queen Victoria, the death of three presidents, Billy the Kid, the Civil War, Andersonville, The Pullman Company, Nicola Tesla, and much more, including the heart of the "Gilded Age."
I've always wanted to write a novel with these folks (and a few others) wandering in and out of my central character's life. It would span from about 1840 to 1940. Perhaps the most incredible and dangerous period in human history.