The ancient myth of the deaf adder seems to have been a favourite illustration of the futility of unwelcome counsel.

“What, art thou, like the adder, waxen deaf?
Be poisonous too.”
2 King Henry VI. Act ii. sc. 2.
“Pleasure and revenge have ears more deaf than adders
To the voice of any true decision.”
Troilus and Cressida, Act ii. sc. 2.
“He flies me now—nor more attends my pain
Than the deaf adder heeds the charmer’s strain.”
Orlando Furioso, cant. xxxii. 19.
(Hoole’s translation.)

A serpent or adder stopping his ears, by some writers termed “an adder obturant his ear” from the Latin obturo, to shut or stop, is a very ancient idea. It is said that the asp or adder, to prevent his hearing unwelcome truths, puts one ear to the ground and stops the other with his tail, a device suggested by Psalm lviii. 4,5: “They are like the deaf adder that stoppeth her ear; which will not hearken to the voice of charmers, charming never so wisely.”

Alessandro d’Alessandri (+ 1523), a lawyer of Naples, of extensive learning, and a member of the Neapolitan Academy, took for device a serpent stopping its ears, and the motto, “Ut prudentia vivam” (“That I may live wisely”), implying that as the serpent by this means refuses to hear the voice of the charmer, so the wise man imitates the prudence of the reptile and refuses to listen to the words of malice and slander.

It is said that the cerastes hides in sand that it may bite the horse’s foot and get the rider thrown. In allusion to this belief, Jacob says, “Dan shall be ... an adder in the path, that his rider shall fall backward” (Gen. xlix. 17).

Asp.—According to Sir Gardiner Wilkinson, the ancient Egyptian kings wore the asp, the emblem of royalty, as an ornament on the forehead. It appears on the front of the double crown of Upper and Lower Egypt.

Many terms have been invented by the heralds to express the positions serpents may assume in arms. Berry’s “Encyclopædia of Heraldry” illustrates over thirty positions, the terms of blazon of which it is impossible to comprehend, and hardly worth the inquiry. Few of these terms are, however, met with in English heraldry.

Two serpents erect in pale, their tails “nowed” (twisted or knotted) together, are figured in the arms of Caius College, Cambridge. In the words of the old grant, they are blazoned “gold, semied with flowers gentil, a sengreen (or houseleek) in chief, over the heads of two whole serpents in pale, their tails knit together (all in proper colour), resting upon a square marble stone vert, between a book sable, garnish’t gul, buckled, or.”

Fruiterers’ Company of London.—On a mount in base vert, the tree of Paradise environed with the serpent between Adam and Eve, all proper. Motto: Arbor vitæ Christus, fructus perfidem gustamus.

Nowed signifies tied or knotted, and is said of a serpent, wyvern, or other creature whose body or tail is twisted like a knot.