E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Cauline (Sir) (2 syl.).
A knight who lived in the palace of the King of Ireland, and used to serve the wine. He fell in love with Christabelle, the kings daughter, who plighted her troth to him secretly, for fear of the king. The king discovered the lovers in a bower, and banished Sir Cauline. After a time an eldridge came, and demanded the lady in marriage. Sir Cauline slew the Soldain, but died of the wounds received in the combat; and the fair Christabelle died of grief, having burst her gentle hearte in twayne. (Percys Reliques, iv.)