The complete peerage, or a history of the House of Lords and all its members from the earliest times (1998) [Vol.14, Addenda & corrigenda]
Minutes of the evidence given before the Committee of Privileges to whom the petition of Archibald Borthwick, Esq., Claiming the title of Lord Borthwick was referred (1869)
Minutes of evidence given before the Committee of Privileges to whom the petition of Thomas Stpleton ... claiming the Barony of Beaumont, was referred (1840)