Earl of Cambridge
In 1659 Henry was formally created Duke of Gloucester and Earl of Cambridge by Charles II, but suddenly died of smallpox shortly after, much to his brother's distress. Decades later, during the exclusion crisis, Henry was looked back on as a kind of 'lost leader'; as what might have been a legitimate, warlike, Protestant alternative to the unpalatable claims of the Catholic Duke of York and illegitimate Duke of Monmouth.