The strange thing for me is that Pele towers seem to stop at the Tyne. We never seem to hear of any any further south of the Tyne, I know the reivers didn't get that far south but we had other incursions from the North that went a lot further South than Durham, did we have fortified farmhouses or homestead? Did they flee to the nearest castle? Was the lack of apparent Pele Towers down to the Prince Bishops? I think I'll have a sniff about.