E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A very young knight who undertook to rescue the lady of Sinadone. After overcoming various knights, giants, and enchanters, he entered the palace of the lady. Presently the whole edifice fell to pieces about his ears, and a horrible serpent coiled round his neck and kissed him. The spell being broken, the serpent turned into the lady of Sinadone, who married the knight that so gallantly rescued her. (Libeaux, a romance.)