- A concrete, cylindrical pedestal on which a spigot mortar was mounted. The pedestal is often the only evidence for a Spigot Mortar emplacement to survive.
- English Heritage
- http://creativecommons.org/licenses/by/3.0 (FISH Thesaurus of Monument Types)
- http://www.english-heritage.org.uk (FISH Thesaurus of Monument Types)
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