Help with identification

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I was just wondering that myself. And, I believe you are correct. She appears to be Audrey Meadows. I also noticed that there was another girl handing out cigarettes and collecting letters to her right. I wonder if that may have been her sister Jane but was cut out by the camera angle. You can see her hand and arm extended out at times. And the soldiers can be seen tossing letters out to someone on the right of Audrey as the train starts to move. However, neither of the sisters appears in the cast list. Of course, cast lists don't always include the numerous extras...and there were an incredible number of extras in this movie. I also noticed that they appeared to be dressed as though they had just walked off from a stage routine. Seems that someone out there must know. Just wondering.