I was working away on the video today and came across an item I found during my research. It is from the March 1926 Variety called ANOTHER CHAPLIN "FIND":
"Charlie Chaplin figures he has found another star in the embryo. Her name is Linda Nixon, sister of Marion Nixon.
Miss Nixon has a small part in the comedian's latest, 'The Circus''. Should her work prove satisfactory Chaplin contemplates making her his leading woman for a following picture."
Actually, I don't know Linda Nixon but wonder, if she was in 'The Circus', she could have been the lady in the 'disappearing act' scene. I could be totally wrong, but she was the most notable woman I can think of in that picture in a small role. She also reminded me a bit, in looks, to Georgia Hale. Here is a link to the Leading Ladies he did hire.
NOTE: Linda Nixon didn't play in the disappearing act. That scene was played by Betty Morrissey.