In my post “Stepping back: Thomas Casbon, 1743-1799” I introduced the Genealogical Proof Standard and how it is applied when tracing one’s ancestry back in time. With this post I will step back one generation in the family I previously labeled “The Peterborough Casbons.”
This family originated in village of Littleport, about 6 miles north of Ely.
Map showing Littleport and Ely, Cambridgeshire
My series, “How doth your garden grow…” started with Thomas (1776-1855), a gardener, who left Littleport, and whose sons settled in Peterborough. I’ll use his baptismal record of 1778 to start the stepping back process. 
Ann Casborn daug.r of Tho.s & Mary _ _ _ _ _ _(July) 26
Tho.s Casborn son of Tho.s & Mary _ _ _ _ _ _ _ _ _ 26
Rebecca Casbonr daug.r of Tho.s & Mary _ _ _ _ _ _ 26
(Click on image to enlarge)
This record provides an unexpected bonus, since it also shows that two of Thomas’ sisters were baptized on the same day. This was a fairly common occurrence at the time. Unfortunately, it does not tell us when the children were born or in what order. My estimate that Thomas was born in 1776 is based on his reported age of 65 on the 1841 Census. 
This record gives us the names of Thomas’ parents as Thomas and Mary Casborn. Looking back a few years in the Bishop’s Transcripts, I found this marriage record. 
“Thomas Casborn of this Parish Single-man and Mary
Diamond of the same Single-woman were married by
Lycence June the Eleventh 1762” (Click on image to enlarge)
There is no conflicting information to resolve. This was the only Thomas living in Littleport at the time. Looking back further, I found this baptism record from 1732. 
This lists Thomas’ parents as Thomas and Anne Caseborne. Again, there is no conflicting data, so this is most likely the same Thomas who married Mary Diamond in 1762.
We already know from the 1778 baptismal records that Thomas and Mary had children named Ann, Thomas, and Rebecca. A records search shows the baptisms of three other children: Thomas (baptized and buried in 1766); , Elizabeth (baptized 1769);  and Sarah (baptized 1772). 
Based on this information, here is a simple family tree for Thomas and Mary.
Of their children, I have not been able to find any other records for the daughters Elizabeth, Sarah, or Rebecca. Ann, who was baptized in 1778, had a daughter Esther, apparently out of wedlock. Esther was baptized in 1798.  Ann later married a widower named Samuel Handly in 1806. 
I haven’t been able to find any other records for Mary Diamond. There are no baptismal records for her or any other Diamond family members in Littleport or nearby areas. Nor is there a death record for her as Mary Casborn.
Thomas, the father, was buried on December 27, 1780 in Littleport.  With the departure of his son Thomas, baptized in 1778, The Casbon/Casborn family name also departed from Littleport.
I will continue stepping back into the family history in Littleport with future posts.