https://web.archive.org/web/20070505170651/http://www.nottingham.ac.uk/mss/online/family-estate/collections/manvers/3rd_earl_manvers.phtml|archive-date=5 May 2007 (fr)
https://web.archive.org/web/20070505170651/http://www.nottingham.ac.uk/mss/online/family-estate/collections/manvers/3rd_earl_manvers.phtml|archive-date=5 May 2007 (fr)