Croggan

Then she saw Tom sitting on the chimney-stool, and his wife taking on the tip of her finger from a croggan (limpet-shell) what appeared to be salve, which she rubbed over her husband's eyes.

Conjurors and parsons were brought in, who for a time bound the troublesome ghost to emptying Dozmary Pool on Bodmin with a "croggan" or limpet shell.

From time immemorial "croggans" and "bollachans" or milk basins were made out of clay by the people in the district for their domestic use, but besides these there is no record of any other utensils having been manufactured.

He had sent the ground officer with a "croggan of tar" with which he marked the ears of all the stock.

In the Western Isles a native tradition of building pots, known as croggans, by hand, survived into the 20th century.