Mentioned in 1851 Census Return for Northcott hamlet, Devon, England. Living at Boyton Mill, aged 76, farmer of 35 acres employing 3 agricultural labourers. Born Tetcott, Devon, England 25 April 1774.
http://www.familysearch.org lists the above birth date as the Christening date.

John Oliver, became a tenant of "Boyton Mills", Devon, England in 1827 and purchased it in 1842. Where did John live before 1827? What did he do? Did he farm? Where did the Mill skills come from? James was a farmer. Were these learnt in the previous place of abode?

Date of death from headstone in the "Church of the Holy Name Boyton" churchyard and found when Brian of nzolivers visited Devon and Cornwall in April 2008.

A copy of John’s Will dated 29th October 1842 obtained by Brian Oliver of nzolivers.com (b.1950) on his April 2008 visit to Devon lists the following children:
John, Thomas, Mary, Ann - each to receive ten pounds
James, William, Samuel - each to receive one pound
Francis - to inherit Boyton Mill after John’s wife (Grace) dies.

Brian suspects that James and Samuel received only one pound because they emigrated and perhaps John and Grace helped with payment of their passage? Brian does not know what happened to William. Did he emigrate somewhere?

Brian has many documents to study before completing this section about John Oliver and his children. This includes confirming dates which has more work to be done on.

Peter (Pete) G M Dale of Toronto, Ontario, Canada. Pete is related to the Olivers in Devon. Pete's great great great grandfather was John Batten (Battin) b. 1793, sister of Ruth Batten who married James Oliver b.1805. Ruth and James emigrated to New Zealand in 1841.

Pete writes about the 1851 England Census, “Father John, his wife Grace and their adult son John are living in Boyton Mill in Northcott, Devon. John Sr. was born in Tetcott and his son John (b. c. 1802) in Holsworthy. Son Francis (b. c. 1822), a Miller like his father, was born in Pyworthy, Devon and is living beside his parents John, Grace, et al. Thus, it would appear that after the birth of John and Grace’s children in Holsworthy, the family moved to Pyworthy, where ‘our’ Battin family lived, and had at least 2 more children. Ruth Batten and James Oliver most likely met while they both lived in Pyworthy.
A review of ‘Pyworthy Baptisms – 1813-1839’, (2005), DFHS, has the following entries for children of John Oliver and his wife Grace which confirms the 1841 and 1851 Census of England entries above:
• Ann Oliver dau. of John and Grace, Yeoman, from Derril, bap. June 8, 1817;
• Samuel Oliver son of John and Grace, Farmer, from Derril, bap. July 18, 1819; and
• Francis Oliver son of John and Grace, Farmer, from Derril, bap. April 8, 1822.

Entry found in the 1851 England Census for Northcott Hamlet in Boyton Parish, County and Parliamentary division of Northern Division of Devon, for Boyton Mill
John Oliver, Head, Married, age 76, [Farmer of 35 Acres employing 3 Ag Lab, born Tetcott Devon, England [circa 1775]
Grace Oliver, wife, Married, age 73, born St Giles in the Heath Devon, England [circa 1778]
John Oliver, son, Married, age 49, born Holsworthy, Devon, England [circa 1802] [This son John’s wife Mary is listed in the Northcott Village entry as a servant]
Thomas Bate, Servant, Unmarr, age 16, Ag Lab
Able Werrey, Servant, Unmarr, age 13, Ag Lab
John Martin, Servant, Unmarr, age 12

Place of death as Henford, Devon, England from Amy Utting’s family tree advised by email on 4 October 2018. Henford is 4 miles north-east from Boyton Mill by road. Amy is the x3 great granddaughter of Francis Oliver b 1840.

Record of marriage as alerted by Katia and Tim Oliver In an email dated 10 January 2021. (Tim Oliver is a x3 great grandson of James and Ruth Oliver, his grandfather being Ivor James Clark Oliver 1907-1989).
This record was found in “A Marriage Register Book, According to act of Parliament 1754” Page 13 as scanned and held by the South West Heritage Trust for Somerset, Devon and the South West of England.
First name(s): Grace
Last name: Lane
Marriage year: 1800
Spouse's first name(s): John
Spouse's last name: Oliver
Spouse's Occupation: Thatcher
Denomination: Anglican
Parish: Luffincott
County: Devon
Country: England
Place: Luffincott
Marriage Banns Published: 02 Mar 1800
Marriage Banns Published: 16 Mar 1800
Marriage Banns Published: 30 Mar 1800
Marriage date: 01 Apr 1800
Archive: South West Heritage Trust
Please note that Luffincott is five miles North of St Giles in the Heath where Grace was baptised. The church at Luffincott was most likely "St James’s Church". The church stands near to the farmyard of Luffincott Barton, a mid-19th-century farmhouse and out-buildings which were part of the Tetcott estate. The church tower was was re-built in 1791, nine years before the wedding of John and Grace.

From records online for England Births and Christenings database - Baptisms, found in March 2021.
Name: John Oliver
Event Type: Christening
Event Date: 25 Apr 1774
Event Place: Tetcott, Devon, England
Event Place (Original): Tetcott, Devon, England
Sex: Male
Father's Name: John Oliver
Mother's Name: Hannah
https://www.familysearch.org/ark:/61903/1:1:NBQH-ZV5
Note: Login to FamilySearch required

Image of Auction Notice for Boyton Mill in the 'Cornwall Gazette 30 January 1817' from contributor, Katia, wife of Tim Grant Oliver, in an email dated 12 July 2022. This pre-dates when this John Oliver purchased the Mill in 1832. In the publication, "Historic Building Record Boyton Mill", prepared by Deborah Laing-Trengove of the University of York, page 8 reads, "The mill was left unsold until 1832 when the then tenant, John Oliver, purchased the property. The mill remained in the ownership of the Oliver family until 1897, followed by Thomas [Yeo] and then Frank Yeo, then Jack Cole the last person listed as miller, who sold the mill in 1951 to a Mr Hill who ‘modernised the premises’.
https://nzolivers.com/articlesdocs/Deborah%20Laing-Trengrove%20Report.pdf

Died of “Old Age Not Certified” from image of death register record attached to an email dated 8 July 2023 from Katia and Tim Oliver.
Tim Oliver is a x3 great grandson of James and Ruth Oliver, his grandfather being Ivor James Clark Oliver (1907-1989).