|Granite tor from nearby Zennor Hill - image by Cornwall Guide [CC-BY-SA-2.0 (www.creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons|
Between St Ives and Zennor, on the lower road over Tregarthen Down and a Logan rock. An old man, perhaps ninety years of age, told me he had often logged it, and that it would make a noise which could be heard for miles."
[The exact location of the down is unknown to me, but their is a farm called Tregarthen Farm in the correct location, so the down must have been near by.]
Map - Tregarthen Farm