Folklore

Callanish
Standing Stones

.. the Callinish Stones .. by very long tradition are looked upon as ‘countless’ locally..

.. Mackenzie [in ‘History of the Outer Isles, 1903] mentions a very early tradition which associates the Callinish Stones with the tombs of warriors slain in battle.

You can’t help feeling wary of ‘very long traditions’ but that’s just how you relate folklore I suppose – you know, once upon a time. From the ‘Letters to the Editor’ section:
F. H. Amphlett Micklewright
Folklore, Vol. 87, No. 1. (1976), pp. 115-116.