Domesday Tables for the County of Hertford by Francis Henry Baring

Cambridge County Geographies
Hertfordshire by R. Lydekker

The Parish Register and Tithing Book of Thomas Hassall of
Amwell by Stephen G. Doree

Abbots Langley by S. G. Thicknesse

The Parish Registers of
Aldenham, Hertordshire, 1559-1659, by Kenneth L. Gibbs and William Brigg
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C. G. Brisee Genealogy Library
in 1947 when it was the
Irwin Consolidated School