gjrk wrote:
the capstone of (for example) a portal tomb as the focus of the whole exercise of construction: the veneration of a large rock resulting in its raising to a position of awe-inspiring display.
I've been saying for years that portal tombs weren't covered entirely by a cairn. At most the cairn would have reached the base of the capstone. An example of all the other tomb types have been found with a cairn covering it, but not one portal tomb has been found like that, even ones covered by bogs. As far as I'm aware that goes for the ones in England & Wales (and the few farther afield that have similar characteristics), too. 