Ada Copeland, an African-American woman born in Georgia just months before that state seceded from the Union, moved to New York City in the mid-1880s. There, she met a man named James Todd. He was light-skinned, handsome, had a good job for an African-American man in that time — a Pullman porter.

They hit it off, and eventually married. They had five children and a house in Brooklyn. Their story would be unremarkable if not for one detail: Nothing James had told his future wife was true.

"James Todd was really not black, he was not a Pullman porter, and he was not even James Todd," author Martha Sandweiss tells NPR's Steve Inskeep. "He was in fact Clarence King, a very well-educated white explorer who was truly a famous man in late 19th century America."