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.
Cartularium Prioratus de Colne (Fisher (1946))
Guide to the Essex Quarter Sessions and Other Official Records (Emmison (1946))
Essex Sessions of the Peace, 1351, 1377-79 (Furber (1953))
Pleshey Castle (Rahtz (1960))
Field Systems in Essex (Hunter (2003))
Medieval Lawyer: Clement Spice of Essex (Starr (2014))
Excavations along the M25: Prehistoric, Roman and Anglo-Saxon Activity between Aveley and Epping, Essex (Biddulph and Brady (2015))