==Semi-useless link== 
 A blurry and rather illegible ca. 1400 depiction of the coat of arms of the Priory of Black Canons (monastery of Christ Church) near Aldgate is claimed to be included in Harley MS 7026 f.11r (St. John Writing On The Island Of Patmos, In 'The Lovell Lectionary') at http://www.bl.uk/onlinegallery/onlineex/illmanus/harlmanucoll/s/011hrl000007026u00011v00.html (not sure they're showing the right page...).