Sharon Kay Penman said this quote

Messages continued to arrive from the Earl of Warwick, urging Londoners to hold firm for King Harry. Marguerite d'Anjou and her son were expected to land at any time, while from St Albans, Edward sent word that Harry of Lancaster was to be considered a prisoner of state. At that, John Stockton, the Mayor of London, contracted a diplomatic virus and took to his bed.