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- [S51] History of Hertfordshire: History of the hundreds of Dacorum and Cashio, John Edwin Cussans, (Chatto, 1879.), p. 107.
- [S52] Will of Sencippa (Draper) Clytherow Ibgrave, (National Archives Public Record Office).
- [S79] FindAGrave.com, https://www.findagrave.com/memorial/125521403/sence-ibgrave.
- [S899] The Visitation of the County of Leicester in the Year 1619, Harleian Society, College of Arms (Great Britain), (Taylor & Company, Printers, 1870), 52.
- [S51] History of Hertfordshire: History of the hundreds of Dacorum and Cashio, John Edwin Cussans, (Chatto, 1879.), p. 88.
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