That’s a funny and good question.
Perhaps he snuck down to another shore and scooped up more pebbles.
One reason I am a fan of going to Puerto Rico over other Caribbean locales is that technically it is part of the US and I don’t have to go through customs upon returning.
Last time I went I brought a buttload of cool shells and coral back and no one was the wiser.
I also mailed myself lots of really neat plants that I then planted in my yard, some of which are still living, including that damned cactus I wish would die.
But yeah, that may be the only redeeming quality of PR.