One thing to note here is Houdini/Haldane's clothes. This outfit is never seen in the final film. Interestingly, this same outfit appears in several Terror Island publicity photos, yet Houdini never wears this outfit in that film either.
In real life Houdini sported a similar outfit when he traveled to Austria in 1910 and stopped off in exotic ports such as Egypt and Ceylon. So forget the lost Margery Box, Voisin, and Automaton; I want to know what happened to Houdini's pith helmet!
Thanks to Jon Oliver.