Is this where they invented celebrity photography?

The March by E.L. Doctorow is a novel about Sherman's notorious march through Georgia and the Carolinas at the end of the American Civil War. Enterprising photographers followed the armies to record the action and did a brisk business taking pictures of the men in uniform for the cartes de visite that were currently popular. One of Doctorow's characters is a photographer keen to make Sherman's photograph. He tell his apprentice:

As a photographer you get to know human nature and the one thing about human nature it that it is the most famous people who think they are not getting enough of the world's attention.

I like that. I hope they've found room for it in the Steppenwolf stage adaptation which is running in Chicago at the moment.