St Martin's Head Cairns

The Cairn under the St Martin's Head Day Mark, It's been suggested that the Cairn under the day mark isn't a cairn because a wall that runs off from the NW corner of the early-medieval chapel appears to be overlain by the Cairn, But this clearly isn't the case and the old wall is built into the cairn, and not the cairn built over it, The cairn itself is very very clearly a definite cairn, Which even has a couple of Kerbstones remaining