Note 2536 — BOOK XXIX. REMEDIES DERIVED FROM LIVING CREATURES.
John Bostock translation
“The vulgar opinion in Cornwall and most parts of Wales is that these are produced through all Cornwall by snakes joining their heads together and hissing, which forms a kind of bubble like a ring about the head of one of them, which the rest, by continual hissing, blow on till it comes off at the tail, when it immediately hardens and resembles a glass ring.”—Gough’s Camden, Vol II. p. 571, Ed. 1789.