E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Fradubio [Brother Doubt],
says Spenser, wooed and won Duessa (False-faith); but one day, while she was bathing, discovered her to be a filthy old hag, and resolved to leave her. False-faith instantly metamorphosed him into a tree, and he will never be relieved till he can be bathed from the well of living water. (Faërie Queene, book i. 2.)