Aged 65 in 1841, born Lancashire
Aged 75 in 1851, born Latham (or Lytham), Yorkshire
Aged 77 in Jan 1853 (when died)

Baptism: "John Son of Benjamin Buckley Clo (i.e. Clothier) & Sarah his wife of Shelderslow"

1851 census record clearly states John (75) is from "Yorks Latham", whilst Mary (70) is from "Lancashire Bolton".  He was 77 when he died (so born Jan or Feb 1776).

Latham is a hamlet in Saddleworth. John and his sister Ann were baptised here.  An article in the the Leeds Mercury, on Saturday, April 25, 1840 advertised for sale:
"FOUR DWELLING-HOUSES with Gardens and Appurtenances, and small CROFT, containing 2 Roods and 8 Perches, situate at Latham, in Saddleworth aforesaid, and now in the Occupations of Ann MAYALL, Samuel DIXSON, Thomas WHITEHEAD, and Others. Also a CHIEF RENT of £1 14s. 7d per Annum, issuing out of, and secured upon another House and Premises, at Latham aforesaid.

There about 30 John Buckley's from Yorkshire born 1776 +/- 5, and almost all from Saddleworth.  By trying to match parents to childrens names, Benjamin and Sarah fit quite well, but obviously not confirmed.

Name: John Buckley
Event Type: Baptism
Baptism Date: 2 Jun 1776
Parish: Saddleworth, St Chad
Parish as it Appears: Saddleworth
Father's Name: Benjamin Buckley
Mother's name: Sarah Buckley
Abode: Sheldreslow
Reference Number: O9/1/1/5
Item Number: 6
Archive Roll: 905

The marriage for John Buckley and Mary Crook, shows them both from Oldham.  John's parents were from Oldham, and his siblings baptised in Oldham, which explains the discrepency.
 

Six Bolton deaths to choose from:  Was alive in 1851 and died by 1861.
Jeff Buckley has his death certificate, and has his death as 27-Jan-1853.

BUCKLEY, JOHN        76 
GRO Reference: 1853  M Quarter in BOLTON UNION 
Volume 08C  Page 209

Name: BUCKLEY, John
Age: 76    
Sub-District: Eastern Bolton
Registered at: Bolton
Reference: EB/21/206

During his time in Bolton he lived at 34 Crook Street and this is the address given on his death cert. with occupation as an 'Oil Cloth Maker'

Died before Tonge cemetery opened in 1856, so not buried with wife Mary.  Does not appear to be at St Peter's Parish church either!

No Will or probate indexed for John Buckley (although there is for John Buckley, Gentleman of Saddleworth in 1858), possibly a cousin.

1841, Aged 60, Born Lancashire
1851, Aged 70, Born G Bolton
1861, Aged 79 when died (in Jan)

Two possible Bolton Baptisms:
Name: Mary Crook
Event Type: Baptism
Baptism Date: 20 Aug 1780
Parish: Bolton le Moors, St Peter
Parish as it Appears: Turton Chapel
Father's Name: Samuel Crook
Mother's name: Mary Crook
Reference Number: L243/1/2/1
Item Number: 3
Archive Roll: 854
IGI Records (file NZ91-84) indicate this Mary, daughter of Samuel and Mary was of Little Lever, and died 10 Jun 1812

Name:    Mary Crook
Event Type:    Baptism
Baptism Date:    24 Aug 1781
Baptism Place:    Bolton-le-Moors, St Peter, Lancashire, England
Parish as it Appears:    Turton Chapel
Father:    John Crook
Mother:    Rachael Crook
Reference Number:    L243/1/2/1
Archive Roll:    854
Abode: Tong

died between 1851 and 1861.  There are several possible matches for Bolton (which included Darcy Lever), but the Lancashire BMD (with age) reduces the choice to one match.

Deaths
Dec 1851   (>99%) Buckley  Mary    Bolton  21 97   Age 3
Sep 1854   (>99%) BUCKLEY  Mary Ann  Bolton  8c 190  Age 1
Dec 1856   (98%) Buckley  Mary     Bolton  8c 121   Age 18
Mar 1857   (>99%) BUCKLEY  Mary     Bolton  8c 166   Age 2
Mar 1860   (98%) Buckley  Mary     Bolton  8a 231  Age 79

Lancashire Death indexes for the years: 1860
BUCKLEY Mary 79 Lever Bolton LEV/7/230

If Mary moved to Bury, then this is also a possibility, but the owner of this grave is James Buckley, and Mary did not have a son James.
Name:    Mary Buckley
Birth Date:    abt 1781
Death Age:    74
Death Date:    abt 1855
Death Place:    Lancashire
Burial Date:    29 Dec 1855
Burial Place:    Bury, Lancashire, England
Church:    Methodist Church

Register of Burials: Borough of Bolton, page 224
Entry No: 4465
Name: Buckley, Mary
Description: Widow of John Buckley, 79 years
Died at: Knowl Place: Darcy Lever
Date of Burial: 7 January 1860
Ceremony Performed By: Henry H. Chether(?)
Place of Burial: No.4 Division, Com No.28
Burial Area: Noconmformist ground

12 JAN 1803   Moor Lane Baptist-Formerly Scotch Presbyterian, Bolton Le Moors, Lancashire, England.


Name:    Sarah Anne Buckley
Birth Date:    12 Jan 1803
Birth Place:    Bolton, Lancashire, England
Event Type:    Birth
Father:    John Buckley
Mother:    Mary Buckley
Denomination:    Baptist
Piece Title:    Piece 1022: Bolton, Moor Lane (Baptist formerly Scotch Presbyterian), 1793-1836

Lancashire Death indexes for the years: 1839
ALSOP Sarah A 36 Eastern Bolton EB/3/181

ALSOP, SARAH  ANN      36 
GRO Reference: 1839  S Quarter in BOLTON UNION
Volume 21  Page 57

This is the only Alsop death and no births in Bolton (1837 to 1841), so unlikely Sarah Ann died in childbirth

Aged 35 in 1841 (looks a bit like 25) with Eliza, also 35
Aged 46 in 1851.

10 APR 1805   Moor Lane Baptist-Formerly Scotch Presbyterian, Bolton Le Moors, Lancashire, England.  This Church was only founded in 1803, so Parents John and Mary may have been married here, or another Baptist Church.

Name:    Cornelius Buckley
Birth Date:    10 Apr 1803
Birth Place:    Bolton, Lancashire, England
Event Type:    Birth
Father:    John Buckley
Mother:    Mary Buckley
Denomination:    Baptist
Piece Title:    Piece 1022: Bolton, Moor Lane (Baptist formerly Scotch Presbyterian), 1793-1836
and
Name    Cornelius Buckley
Birth Date    10 Apr 1805
Birth Place    Moor Lane Baptist-Formerly Scotch Presbyterian, Bolton Le Moors, Lancashire, England
Father    John Buckley
Mother    Mary
FHL Film Number    0560877 (RG4 1022)

BUCKLEY  Cornelius  68  Bolton  8c 249

Lancashire Death indexes for the years: 1873
BUCKLEY    Cornelius    68    Lever    LEV/11/447

BUCKLEY, Cornelius
buried on: 06 June 1873
recorded at:   St Stephen, Lever Bridge (Lancashire)
date of death   06 June 1873

Bolton Weekley Journel, Sat 14 June 1873:
Drowned after "enjoying himself on Friday Night until a late hour" fell into some water while trying to climb over the back yard wall.

Cornelius is buried at St.Stepeh, Lever Bridge.  There is a headstone (see pictures).  Cornelius (68) is buried with wife Esther (66), sons Josuah (5) and Ephraim (9 mo) and daughter Sarah Ellen (61).

Jn'n was 30 in 1841, born Lancashire
Aged 44 in 1851
Aged 64 in 1871, born Bolton


All the other siblings were Baptised at Moor Lane Baptist, Bolton le Moors, Lancashire.  Jonathan's record isn't indexed with FamilySearch, so perhaps Jonathan isn't part of this family.

I suspect the following FamilySearch record may be a typo, and is actually 21 Jan 1807.  This would then match with all other records, including ALL his siblings baptism records at the same place.  The death index also suggests he was born in 1807.

Birth:  21 JAN 1827   Moor Lane Baptist-Formerly Scotch Presbyterian, Bolton Le Moors, Lancashire, England.  (Should be 1807).

Name:    Jonathan Buckley
Birth Date:    21 Jan 1827
Birth Place:    Bolton, Lancashire, England
Event Type:    Birth
Father:    John Buckley
Mother:    Mary Buckley
Denomination:    Baptist
Piece Title:    Piece 1022: Bolton, Moor Lane (Baptist formerly Scotch Presbyterian), 1793-1836

WARNING: There is another Jonathan Buckley of Old Bank, Slategetter baptised 2 May 1807 at Oldham, son of James and Betty.

BUCKLEY, JONATHAN        74 
GRO Reference: 1881  M Quarter in BOLTON 
Volume 08C  Page 307

Aged 25 in 1841 census (+/- 5 years)
Aged 37 in 1851, in East Bolton.

Name:    Mary Buckley
Birth Date:    3 Nov 1813
Birth Place:    Bolton, Lancashire, England
Event Type:    Birth
Father:    John Buckley
Mother:    Mary Buckley
Denomination:    Baptist
Piece Title:    Piece 1022: Bolton, Moor Lane (Baptist formerly Scotch Presbyterian), 1793-1836

Presumed diad after 1851 and before 1871

There are no Mary Buckley GRO deaths registered at Bolton with a good age match. The closeset match is Q3 1883, aged 74.

Younger brother Benjamin moved to Ashton, so Mary may have followed him there. There are several possible deaths registered there.

BUCKLEY, MARY        78 
GRO Reference: 1892  M Quarter in ASHTON UNDER LYNE 
Volume 08D  Page 459
Note: This may be Mary (aged 77 in 1891) wife of James.
or
BUCKLEY, MARY        76 
GRO Reference: 1891  M Quarter in ASHTON UNDER LYNE 
Volume 08D  Page 483
or
BUCKLEY, MARY        63 
GRO Reference: 1876  S Quarter in ASHTON UNDER LYNE 
Volume 08D  Page 326

On the 1841 census, Ellen was aged 20 (which is rounded to 5 years), so was between 15 and 25 (i.e. born 1816 to 1826).

The marriage certificate of Ellen and John has Ellen of "Full Age", and John and "Minor", but the 1841 census shows John older then Ellen.  However the Baptism record does suggest she was born about 1816, so of same age, so born before 9 Oct 1816 (i.e. 21 when married)

Ellen was living in Halliwell in 1837, and we only know she was born somewhere in Lancashire (probably East Bolton) from the 1841 census.

23 FEB 1816   Moor Lane Baptist-Formerly Scotch Presbyterian, Bolton Le Moors, Lancashire, England

Name:    Ellen Buckley
Birth Date:    23 Feb 1816
Birth Place:    Bolton, Lancashire, England
Event Type:    Birth
Father:    John Buckley
Mother:    Mary Buckley
Denomination:    Baptist
Piece Title:    Piece 1022: Bolton, Moor Lane (Baptist formerly Scotch Presbyterian), 1793-1836

Died between 1841-42.  Lancashire BMD has Ellen died in East Bolton, in 1842, aged 26.  The others ages dont match.

Deaths Sep 1842   (>99%)
MATHER  Ellen     Bolton  21 51

Lancashire Death indexes for the years: 1842
MATHER Ellen 26 Eastern Bolton EB/6/389

Death recorded in Great Bolton (Eastern Bolton).  Age 26.  Husband John Mather, and Oil Cloth Maker, was in attendance at Crook Street, Great Bolton.  The death was recorded on 8-Sep-1842 by John Scowcroft, Registrar.

Ellen was not buried at St Peters or Tonge, so possibly at St Stephen and all Martyrs, Darcy Lever (where brother Cornelius is buried).

The Manchester times reported Ellen's death (Sat 17 Sep 1842 edition):  "DIED: - On the 7th instant, aged 26 years, Mrs Ellen Mather, of Crook-street, Great Bolton".

Born in 1823/4 according to 1851 census (age 27)
Born in 1823/4 according to 1861 census (age 37)
Born in 1822/3 according to 1871 census (age 48) - Correct

Baptised: 25 SEP 1822   Moor Lane Baptist-Formerly Scotch Presbyterian, Bolton Le Moors, Lancashire, England

Name:    Benjamin Buckley
Birth Date:    25 Sep 1822
Birth Place:    Bolton, Lancashire, England
Event Type:    Birth
Father:    John Buckley
Mother:    Mary Buckley
Denomination:    Baptist
Piece Title:    Piece 1022: Bolton, Moor Lane (Baptist formerly Scotch Presbyterian), 1793-1836

WARNING: There is another Benjamin Buckley baptised 24 Feb 1822 at Shaw, son of John and Sarah of Martfield, a Joiner.

Died by 1881

BUCKLEY, BENJAMIN        55 
GRO Reference: 1878  S Quarter in ASHTON UNDER LYNE 
Volume 08D  Page 362

Grave Number 116 at Old St. George, Stalybridge is owned by Benjamin Buckley, but this most likely another.

Cheshire Death indexes for the years: 1878
BUCKLEY, Benjamin  55  Audenshaw, Tameside    AUD/25/35

Name:    Benjamin Buckley
Birth Year:    abt 1823
Age:    55
Burial Date:    22 Aug 1878
Parish:    Audenshaw, St Stephen
Abode:    Hooley Hill
Parish as it Appears:    Audenshaw
Reference Number:    GB127.L199/1/3/2

Headstone:
In affectionate remembrance of Benjamin BUCKLEY of Hooley Hill who died August 19th 1876 (should be 1778) in the 55th year of his age Also of Patience BUCKLEY wife of the above who died June 2nd 1902 aged 72 years Also Sarah BUCKLEY who died January 15th 1850 aged 1 year 3 months Also Sarah Annie BUCKLEY who died April 13th 1876 aged 1 year 5 months Also Arthur BUCKLEY who died August 8th 1877 aged 5 years.
[MI No 167 ] (Audenshaw, St. Stephen)

Probate (11 Sept):
Administration of the Personal Estate of Benjamin Buckley late of Guide Lane Audenshaw near Manchester in the county of Lancaster Oil Sheet Maker who died 19 August 1878 at Guide Lane was granted at Manchester of Patience Buckley of Guide Lane Widow the Relict. Effects under £200.