Where Exactly Was Mark Twain Photographed?

In 1867, famous English photographer Eadweard Muybridge photographed famous American writer Mark Twain at "Piedmont White Sulphur Springs."

The photo, from the Joseph R. Knowland collection of the Oakland History Room at the Oakland Public Library, shows Twain in top hat signing autographs. An arrow pointing to Twain was added by graphic artists at the Oakland Tribune, according to library records.

Muybridge is perhaps best remembered for his successive-frame photography capturing human and animal movement, and is credited with proving that a running horse can have all four hooves in the air at once.

We're asking readers to help us pinpoint the exact location of where this photo was taken. If you know or have a good guess, please tell us in comments.