E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Tregea’gle.
To roar like Tregeagle—very loudly. Tregeagle is the giant of Dosmary Pool, on Bodmin Downs (Cornwall), whose allotted task is to bale out the water with a limpet-shell. When the wintry blast howls over the downs, the people say it is the giant roaring. (See GIANTS.)
