could be because it's a ruin up a hill, and people used to read their bibles and like romantic things?

I found this on a geocaching site (spit)
http://www.geocaching.com/seek/cache_details.aspx?guid=006d6823-4be2-419d-8495-de1288e73ff1
which suggests the locals used to take enervating walks up here on a sunday and get a bit of sunday school at the spot.

but if no-one here turns out to know any better, I'd say get down the local studies library and see if someone can help you there...