I was looking at some unidentified film stills a few weeks back and
ran across a photograph from c. 1917 that seems undoubtedly to show
Olive Thomas in a yet uknown production. The date and origin of the
photo are uncertain, as are the identifications of the actors which it
portrays, but I think it is certain that it shows Ollie in character.
If interested, you can find it at
www.silentfilmstillarchive.com/unknown.htm
p.s. they also have a couple of stills from "A Girl Like That," an
Olive Thomas vehicle of 1917, elsewhere on the same site. You can
search for it by her name or by the title of the film.