Two questions, please
1. In the circus convoy scene, the two small people are obviously real-life small people, and the Human Skeleton, while not exactly a skeleton, is certainly long and lanky enough. But are the supposed Siamese Twins really Siamese Twins? And is the Bearded Lady really one (and if not, was this a man wearing drag or a woman made up with a fake beard)?
2. Many people have commented on a homosexual subtext in several of Hitchcock's films (Martin Landau's character in North by Northwest, the killer Bruno in "Strangers on a Train", etc). What about the two men in the front seat when Bob Cummings and the saboteur with glasses are being driven to New York? The two men are singing in unison "Tonight We Love" (a popular song of the times which actually uses the opening these of Chaikovsky's Piano Concerto N° 1), and the scene frankly adds nothing at all to the development of the plot other than showing that Cummings is going to New York (which the actor playing the member of the sabotage group has already announced is going to take place, and which is reinforced by the view of the skyline when they arrive), so is this scene just another playful Hitchcock nod (maybe even a not-so-politically-correct one, i.e., "just look at the kind of deviates who make up a group of saboteurs, not like red-blooded heterosexual Americans")?