If that's who you mean, I have no idea who she is. IMDB lists Helen Gilbert as "Girl on Trolley (uncredited)"
Here's Helen Gilbert:
Doesn't look like the same person, though.
Helen Gilbert is there; she's the one with the pigtails (upper left corner of the frame).
Keep workin', Knitty! We'll find her yet!
pvit, Thank you for posting these. I've been finding beautiful screencaps on line and when I purchased my new computer last winter hoped to make some myself, but didn't know where to begin. I'll look into DVDsnap now. Do you find it easy to use?