E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A Saxon Bishop of Worcester, who received his see from Edward
the Confessor. Being accused of certain offences, and ordered to
resign his see, he planted his crozier in the shrine of the
Confessor, declaring if any of his accusers could draw it out he
would submit to resign; as no one could do so but St. Wulstan
himself, his innocence was admitted. This sort of miracle is the
commonest of legendary wonders. Arthur proved himself king by a
similar miracle.