|Professor William Dunlop Tait.
The photo seen in part 2 is credited as being Houdini at the Princess Theater in Montreal. But it's actually a still frame from his card manipulation movie Velvet Fingers. To discover why the photo is mistakenly captioned, check out THIS POST at Joe Notaro's HHCE.
Thanks to Dorothy Dietrich and Dick Brookz at the Houdini Museum in Scranton.