Occasional Papers have been issued by the Essex Society for Archaeology and History over the years. These are longer, often commissioned, single studies on specialist topics and form a book in their own right.
Occasional Papers published to date are:
Cartularium Prioratus de Colne (Fisher, 1946)
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Guide to the Essex Quarter Sessions and Other Official Records (Emmison, 1946)
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Pleshey Castle (Rahtz, 1960)
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Field Systems in Essex (Hunter, 2003)
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Excavations along the M25: Prehistoric, Roman and Anglo-Saxon Activity between Aveley and Epping, Essex (Biddulph & Brady, 2015)