Bivalate definitions

Bivalate

A hillfort defended by two concentric ditches.
Found on http://www.castlesontheweb.com/glossary.html

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Bivalate

A hillfort defended by two concentric ditches.
Found on http://www.encyclo.co.uk/local/20018

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Bivalate

a hillfort defended by two concentric ditches
Found on http://www.encyclo.co.uk/local/22129

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Bivalate

a hillfort defended by two concentric ditches
Found on https://www.encyclo.co.uk/local/20402

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