And still the list of alternative Shakespeares rolls on. Yet another candidate was Mary Sidney, Countess of Pembroke. The proponents of this view—a small group, it must be said—maintain that this explains why the First Folio was dedicated to the earls of Pembroke and Montgomery: They were her sons. The countess, it is also noted, had estates on the Avon and her private crest bore a swan—hence Ben Jonson’s reference to “sweet swan of Avon.”