http://californiaimages.blogspot.fr/2011/12/chaplin-rehearsing-in-archway-essanay.html
It's hard to tell if that's really Charlie going through the archway, but that does appear to be Edna (in the hat) & the dog on the right-hand side. I would love to see the original b&w version of this photo.
Thanks to Dominique for sharing this one with me.