Mary Bowker's grave - well spotted John. I simply searched the list for Green and missed it. Mary baptised Jan 1776, died March 1817 so aged 41 but 30 on the gravestone. It seems you can't believe everything you read on gravestones.
There are eleven Green graves in the Little Staughton Baptist graveyard (twelve counting Mary).
I suspect they are mostly one family; that graves 0162-0169 (1803-1827) were a sort of family plot for William that ran out of space, so that graves 0151-0153 (1853-1891) had to be located away from the main group. Grave 0182 (1841) may be unrelated.
I think the little group of graves 0151-0153 are the family of Samuel Green and Sophia (nee. Cant)
0153 SAMUEL GREEN who died 4th Sept 1866 aged 68 years [so born ~1798]
/also SOPHIA his widow who died 9th June 1884 aged 84 years [so born ~1800]
where
* Samuel is the son of William (grave 0169) and Anna Green, born 1798/99
* 3 June 1800 Sophia Cant christened at Great Staughton, Huntingdon, father Thos. Cant, mother Ann
* 7 June 1825 marriage Samuel Green and Sophia Cant at Great Staughton, Huntingdon. The marriage was by licence and Samuel Green made an oath that he and Sophia were over 21 and that she had lived in Great Staughton 'for the space of 15 days last past', and described himself as a yeoman
* 1861 census, Samuel (62) and Sophia (61) are farming Backnoe End
* 1871 census, Sophia (71) retired farmers wife living in New St, St Neots; 1881 census, Sophia (81) still in New St, St Neots
0152 WILLIAM GREEN son of SAMUEL & SOPHIA GREEN who died July 6th 1853 age 24 years
* in 1851 census William is a widower, age 22, born Bolnhurst, living at Backnoe End with his parents.
0151 SARAH JANE the wife of SAMUEL GREEN who died November 17th 1889 aged 62 years [so born ~1827]
/also in memory of SAMUEL GREEN born August 24th 1834 died October 7th 1891
* Samuel born August 24th 1834 was I believe son of Samuel & Sophia Green, and took over Backnoe End farm from his parents
* marriage registered October-December 1866 Samuel Green and Sarah J Robinson, (St Neots, Hunts, Page 0689 Volume 3B)
* 1871 census Backnoe End: Green Samuel (36) head, born Bolnhurst, Beds, farmer of 256 Acres employing 8 men 3 boys;
Green Sarah J (40) wife, born Carlton, Beds. In 1881 census location is called Mount Pleasant, ages are 46 and 52.
I suspect the graves 0162-0169 all relate to William Green who died 1818 (grave 0169) but I haven't got my head around them yet.
0169 WILLIAM GREEN who died July 21 1818 aged 71 years, so born 1746/1747 (and who wrote the will in 1813)
Grave 0164 is particularly interesting - this Anna Green is the right age to be William's mother. So perhaps there is a marriage William Green/Anna unknown in about 1742-1747? Haven't found it yet.
0164 ANNA GREEN wife of WILLIAM GREEN who died on the 23rd October 1815 age 90 [so born 1724/1725]