Ancestry.com. England Manorial Law and Customs [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2004.Original data: Nelson, William. Lex Maneriorum: or the Law and Customs of England. London, England: E. and R. Nurr, and R. Gosling, 1726.
This database contains a work explaining about the law and customs of England, relating to manors, lords of manors, their stewards, deputies, tenants, and so forth. This database is valuable because it is important to understand the manorial system in order to successfully perform research in English land and property records. This record type becomes increasingly more valuable the further back in time you go because they pre-date the existence of many other record types and are one of the most genealogically useful records for that early time period.