1. Absolutely, you can see a clear line from the step sequence in The Pleasure Garden to the Bell Tower in Vertigo. 2. Again yes, as we move towards The Lodger the Hitchcock style slowly in emerging the blonde, the love of curls, steps...no birds or oversized icons yet however. 3.Hitchcock use of sound was amazing but he did not need it. Watch Rear Window, Rope, Vertigo or Psycho without the sound. No sound no title cards and you can follow exactly what is going on what Hitch called "Pure Cinema"