Saint Cuthberts Well, Holywell, Cubert.

Nr Cubert and Holywell

Tony Atkin [CC-BY-SA-2.0 (www.creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons

"In this parish (St. Cuthbert) is that famous and well-known spring of water, called Holy Well, so named, the inhabitants say, for that the virtues of this water were first discovered on All Hallow's Day. The same stands in a dark cavern of the sea cliff rocks, beneath full sea-mark on spring tides. The virtues of the waters are, if taken inward, a notable vomit, or as a purgent. If applied outward, it presently strikes in, or dries up, all itch, scurf, dandriff, and such-like distempers in men or women. Numbers of persons in summer season frequent this place and waters from countries far distant. It is a petrifying well.--Ibid., 53." 

Hope 1893

[I can only deduce this must be Cubert, where between it and the sea is a small hamlet called Holywell. Seems likely. The Megalithic Portal puts a holy well at Trevornick Farm, but also mentions rockpools further up the coast.]

Map - Holywell, Cubert