Page:Medieval Military Architecture in England (volume 1).djvu/100

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84 MedicBval Military ArcJiitectu7X i7i England. was guarded by two mounds, thrown up in 922, of which one has disappeared, but the other, as at Bedford and Buck- ingham, was saved by its incorporation into a Norman castle, to be seen no longer. Sleaford, an episcopal castle, occasionally mentioned in the twelfth century, is now gone, as is the castle of Horncastle, restored to Adelais de Condie in 1 151, but at the same time ordered to be demolished, and which probably stood within the walls of the Roman station, of which large fragments remain. Bitham also is gone, taken by siege and levelled by Henry III. in 12 18. Folkingham, the " Mansio capitalis " of Ulf the constable, was held by Gilbert de Garod, and long afterwards fell to the Lords Beaumont. Boothby was a fortified house of the Paynells or Paganels, and is of late Norman date. Top- clyve Castle was built by Geoffrey, bishop-elect of Lincoln, in 1 174.