Dubious: This image is from an self-stated "unknown source". It's unclear if the image was made of the actual man at the time or if it's an invented image. "Artistic rendering" suggests it's not an image of the actual guy, but just something made up. It's also not even verifiable as to where the image came from. As far as can be verified, it's just a drawing of a guy with a horse made long enough ago to be public domain.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country. Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Austin_Roe.jpg
Original upload log
The original description page was here. All following user names refer to en.wikipedia.