If you haven't paid for it already, I suggest you have it surveyed (plenty of surveyors on this site). If there's is a big problem you can walk away from the purchase.
You might be able to ask someon on this site from Rhode Island to take a look at her too, but a surveyor could save you the price of airfare, and many headaches down the road.
Fun fact #2484: In my avatar, that's DavidPM at the helm of my boat.
Bland, non-political statement goes here.