Castles of Britain & Ireland, 1997: p. 119 (Alnwick, Northumberland, splendid palatial residence at Alnwick)

Bartholomew gaz. (Alnwick: Norman cas. stronghold of the Percys, much enlarged and restored)

Alnwick Castle web site, Jan. 9, 2003 (Alnwick Castle, home of the Duke of Northumberland; attractions include grounds and garden, Regimental Museum of the Royal Northumberland Fusiliers in the Abbot's Tower, Postern Tower containing an archaeological museum, and Constable's Tower has exhibitions on the Percy Tenantry Volunteers 1798-1814; also ideal setting for historical film locations, including Harry Potter films)