As I first read Mombo's post above, I got the impression that what she had were cards from people whose lives her dad had saved.

I was picturing him a member of the US Lifesaving Service... then I re-read it a couple of times and realized differently.

Around here, there are a number of 'antique malls' in which dealers rent a small space to display their wares. These dealers don't need to be there, of course, the mall handles the sales for them from the things on display.

One such booth probably had about 20,000 old post cards, mostly well-organized by subject matter. Fortunately 'Lighthouses' was a topic. But I wonder how many of the state-by-state sorts also had lighthouse post cards in them.

A few other dealers had smaller assortments of post cards, but I didn't have time to search through the scores of booths on my last trip.

Guess I'll make another trip this week and check out the two other antique malls next door as well.