Naming the largest stones
There are many striking glacial erratics in the Cairngorms and in former times many were given names.
This text from http://www.electricscotland.com/history/cairngorm/3.htm describes the origins of several clachs.
On the road to Easter Tulloch there is C.-na- Criche, marking the old march between the counties of Inverness and Moray. There is a C.-na-h Ulaidh, in the fence at the east end of Balliefurth plantation, where a treasure is said to have been found long ago. Opposite Rhymore there is a stone called C.-an-triuchasdaich; it has a hole in it, and was, of old, resorted to for the cure of whooping-cough. There stood, some years ago, two huge granite boulders, facing each other, on opposite sides of the road to Kincardine, near Knock, which bore the name of Clachan-peathrichean, the sister stones; and on the old Church Road there was another splendid specimen, called C.-na-h analach, the resting-stone, where people used to rest and have a "crack" on their way from church; but these have disappeared, being broken up for railway use in 1862. At the top of a ridge on the west slope of Cairngorm, above Coire-chaorunn, is C.-bārraig, sometimes incorrectly called Parruig or Peter. The name is from bārr, top. There is a similar boulder resting on the hill above Beglan, in Glenmore, which bears the strange name of C. an-iurnaich, the stone of the hellish man. Tradition says that a certain man, who had his bothy near this stone, was so notorious for malice and cruelty that he was called "Iurnach," and so gave the name to the stone.
On the flanks of Ben Avon, aside from the many
named tors, rest a number of un-named tors and large erratic blocks of