I discovered a couple of images of stage hypnotist Pat Collins that I want to pass along here.
The first (above) is a publicity photo of Pat Collins: you can see her signature on the right.
The second (above) is a shot from her appearance on "What's My Line?" before she became the sensation she was. She appeared on the program on May 7, 1961, Season 12 Episode 36 EPISODE #563, as a contestant. However, I have not been able to determine whether she stumped the panel or not.