E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
It is said that when the Persians were pushing off from shore after the battle of Marathon, Cynægros, the brother of Æschylos, the poet, seized one of their ships with his right hand, which was instantly lopped off; he then grasped it with his left, which was cut off also; lastly, he seized hold of it with his teeth and lost his head. (See BENBOW.)