A famous explorer, author, and geologist Clarence King (1842-1901), a white man, presented himself as a black railroad worker named James Todd in order to marry Ada Copeland. No one knew that the well-known and respected white explorer was also an unknown and married black man, not even his wife, until he died. The story is told in Passing Strange: A Gilded Age Tale of Love and Deception Across the Color Line by Martha Sandweiss.

Reviewer Elinore Longobardi writes:

Sure, Clarence King was a public figure with a generous paper trail, but what of James Todd? The great care King took to obscure that part of his life reverberates down the years, so that even an assiduous researcher (take a look at the rigorous footnotes) finds only small shards of information.

And so Passing Strange is dotted with lacunae, many of them marked with such phrases as, “No anecdotal stories from Ada’s own childhood survive,” or “It is not entirely clear just how Clarence King’s double life began.” …

The larger point, though, is that society, and thus history, values certain lives over others. Some are chronicled in newspapers, biographies, and archives; others pass into obscurity. The challenge to the present-day historian is to resurrect as much as possible of those rich, yet undervalued lives—and in Passing Strange, Sandweiss more than rises to the challenge.