Rocks, that picture shows it to be larger than I imagined. Even so, if it was a 'travellers rest' would it not have somewhere for a small seat,bench or stone slab for folk to sit on? Not very deep for that. It also looks as if anyone having a drink from it, should it be a water hole, would have had to bend double to get to it. The other thing is,after seeing the arched perimeter wall it would appear to have been built into the wall originally.
Pinz, it is a shame all those bits of History
were taken away. They do give us a reminder of our heritage, and all we seem to enjoy most is, e.g. a trip to a museum, heritage centre or a quaint little village, when we get the chance. Trying to get the flavour back of what we must still have a yearning for. Maybe the quiet,rural life.