Alfred Hitchcock in Drag?

Director Alfred Hitchcock made a habit of cameo appearances in the opening scene of his films. Is it possible he made more than one appearance in some films? In North by Northwest, he is seen running for a train and missing it. But here's something else later in the movie...

North by Northwest: About 43 minutes into the film Roger Thornhill (Cary Grant) has boarded the Chicago-bound Twentieth Century Limited and is hiding in the restroom. Two Pullman conductors make their way through the adjoining Club car checking tickets. In a brief segment, the conductors pause for a moment to examine the ticket of a plump elderly woman in a blue dress. Eventually satisfied, the conductors move on down the train and the portly woman turns toward the camera and gives a slightly bewildered shrug of her shoulders. At that moment the woman’s features become strikingly familiar.

FilmPosters.com has many screenshots, so you can decide for yourself. Link -Thanks, eLzo!

Update: You can see a good copy of the clip in question here. -Thanks, Alex Zavatone!