 PLOT: Challenger gives Summerleee a note with "directions" on it to  The Lost World. He then shows up at 12:00 when the expedition is  supposed to start. How would Challenger guarantee himself that he  would show up exactly at that time? Plus, if he did it would mean  that he would have to be on the same boat, which he wasnt. He  couldnt have been on a different boat and left at the same time for  the same place either. That is a waste of resources and a  transportation company would not do it.