Goodness! That answers that then! It seems mounds and barrows were 'fair game' if you pardon the expression. But back to the cairns...sifting through everything that's been posted during the past 24 hours, I'm even more convinced that while some of the formations/structures encountered over the years have the appearance of being robbed out cairns (and doubtless many were) some are monuments, as yet unclassified, in their own right. Thus far it has been convienient and perhaps over simplistic to regard them as thus, but I remain far from convinced that this is the case.