|Biggleswade, Bedfordshire, England|
The existence of this castle was discovered by aerial photography, in 1954, which showed the remains of a motte and bailey castle with a double ditch around the motte and a single ditch around the bailey.
Some excavation of the site was done in 1962 and 1968. The excavations found evidence of timber structures, as well as pottery.
- "A ringwork and bailey castle, ring ditch and enclosures east of Brookland Farm". Historic England. Retrieved 25 July 2019.
- Fry, Plantagenet Somerset, The David & Charles Book of Castles, David & Charles, 1980. ISBN 0-7153-7976-3
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