It had to be two-way travel as well. Early arrivals must have traveled back to their points of origin and spread the word. Otherwise, more arrivals would be accidents.
I sat the other day and viewed a collection of photos from Australia, South America, and Egypt...all had wall drawings or carved wall situations, with men walking with a ‘handbag’ in their hand. Similar size....similar build...similar handle.
Now, what are the odds that the Aborigines, the Egyptians, and the Aztecs....would all have the same type bag to be carried by some respected ‘visitor’?