Hi Dave
< I think the Horncliffe and Grubstone circles may be the remnants of kern cairns? (Paulus?) >
Horncliffe puzzles me more than any of the circles up there. The more I've looked at that place, the more I've come to think it was perhaps just a living-space. Grubstones was definitely a death/burial spot, as human remains were found there - and the singular tomb on its southern side shows this aswell.