E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
daughter of Calchas the Grecian priest, was beloved by Troilus, one of the sons of Priam. They vowed eternal fidelity to each other, and as pledges of their vow Troïlus gave the maiden a sleeve, and Cressid gave the Trojan prince a glove. Scarce had the vow been made when an exchange of prisoners was agreed to. Diomed gave up three Trojan princes, and was to receive Cressid in lieu thereof. Cressid vowed to remain constant, and Troïlus swore to rescue her. She was led off to the Grecians tent, and soon gave all her affections to Diomednay, even bade
him wear the sleeve that Troïlus had given her in token of his love.
As air, as water, wind, or sandy earth,
As fox to lamb, as wolf to heifers calf,
Pard to the hind, or step-dame to her son;
Yea, let them say, to stick the heart of falsehood,