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Here is source that can only be accessed via ancestry dot com
A genealogical chart of the family of Tatham, of Tatham in the county palatine of Lancaster
There is a 20-some page book and a (faulty) genealogical chart. yet it's marvelous read:
https://www.ancestry.com/imageviewer/collections/29099/images/dvm_G...
The link for the pedigree chart (same writer, Richard E. Tatham) is directly available:
https://www.tathamhistory.org.uk/tatham-family.php
https://www.tathamhistory.org.uk/resources/tathamfamily/chart-entir...
all else failing, go to the profile: Marmaduke Tatham
The work of Richard E. Tatham is sourced and has interesting ancient history:
1) The prior name of the Tathames, de Tathame, Tatham... was TATE, evidently of Saxon heritage. The Tate/Ttahams were of particular significance prior to the 14th century. The manorial domain(s) passed out of their tenure prior to "the 34th year of Edward, III of England (1360). Hence, we find that, in the Yorkshire/Lancashire region, Tatham and other similar families were husbandmen in farming communities. Keep in mind, I speak only of those left connected to and living full-time in the Dales and along the Lune and the Wenning.