Deanej-- Would that work? Having a resource on a coast in a city's fat cross with sailing doesn't automatically make it accessible; I'm positive I've had to build a road to corn or whatever in that situation. I should dig up the savegame and check that out.
Even if it does work, though, the problem with that is that I would have to research a way to get culture (probably mysticism), then build the culture thing (again, a monument), then wait x more turns for the pop to occur, THEN build a mine. Oh, and I'd have to find time to build a galley in between then. And THEN I can start building my first prat. By the time I built a respectable amount of them, it seems they'd be fast approaching obsoleteness.
If I can find a savegame, I might post it somewhere so people can play with it. It's an interesting challenge.