Drop by what once was the lighthouse keeper’s favorite Chinese restaurant – the only Chinese restaurant within 50 miles of the lighthouse. Order chop suey.
While you’re waiting, consider where the lighthouse keeper might have gone. Draw a little map on a paper napkin. Attempt an Internet search, but find the phone in your pocket intact, but dead. Search your other pockets to find a wallet, a credit card, some cash, and the note from the library you found so many weeks ago. Wonder why the universe is suddenly kind.