Richard Smith of Deane on marriage record
Assumed to be similar age to Susan

Baptisms: 12 Sep 1766 Walmsley Meeting House, Bolton le Moors, Lancashire, England
Susan Mather - Child of Richard Mather & Ann (formerly Howarth)
    Abode: Turton
    Notes: [Congregation: Walmsley Meeting]
    Baptised by: Aspinal
    Register: Baptisms 1783-1793, Page 4
    Source: LDS Film 560904

Burial: 27 Mar 1853 St Anne, Turton, Lancashire, England
Susan Mather -
    Age: 83 years
    Abode: Gt. Bolton
    Buried by: James Spencer Incumbent
    Register: Burials 1850 - 1878, Page 31, Entry 242
    Source: LDS Family Search

Name:    Susan Mather
Birth Year:    abt 1770
Death Age:    83
Burial Date:    27 Mar 1853
Burial Parish:    Turton, Lancashire, England
Register Type:    Bishop's Transcript
Reference Number:    Drm/2/40

There is no civil registration for the Death of Susan Mather or Susan Smith. The closest match is a Susan Nutter, Bolton (Ref: 8c,224).  Also, there is no Susan Mather in the 1841 or 1851 Bolton Census.

This burial record is for Susan Nutter, or the record has been incorectly indexed.  There is no civil record for Susan Mather, and Susan Nutter was on the 1841 census, aged 70 at Holcombe, Bury.
Deaths Mar 1853   (>99%)
Nutter     Susan          Bolton     8c, 224
Lancashire Death indexes for the years: 1853
NUTTER    Susan    83    Eastern Bolton    Bolton    EB/21/355

Death Cert Ordered (May 2019) but not Susan Mather
      

Died Horwich, aged 4

Name:    Thomas Smith
Burial Date:    17 Apr 1794
Parish:    Horwich, Lancashire, England
Father's name:    Richard Smith
Mother's name:    Susan Smith
Register Type:    Bishops Transcripts
Reference Number:    Drm/2/77a

SMITH Thomas, Son of Richard and Susannah died 15 (April 1794), aged 4 years

Name    Thomas Smith
Gender    Male
Christening Date    11 Apr 1797
Christening Place    TURTON,LANCASHIRE,ENGLAND
Father's Name    Richard Smith
Mother's Name    Susan

Name    Thomas Smith
Gender    Male
Christening Date    11 Apr 1797
Christening Place    Tottington, Lanacashire, Engkand
Father's Name    Richard Smith
Mother's Name    Susan Smith


Thomas Son of Richard & Susan Smith of Bradshaw, Weaver

Lancashire Death indexes for the years: 1868
SMITH    Thomas    71    Western Bolton    WB/37/200

Name:    Thomas Smith
Estimated birth year:    abt 1797
Registration Year:    1868
Registration Quarter:    Apr-May-Jun
Age at Death:    71
Registration district:    Bolton, Lancashire
Volume:    8c
Page:    219

Name:    Thomas Smith
Death Date:    May 1868
Cemetery:    Tonge Cemetery
Burial or Cremation Place:    Bolton, Metropolitan Borough of Bolton, Greater Manchester, England
Has Bio?:    N
URL:    https://www.findagrave.com/mem...

Name    Richard Smith
Gender    Male
Christening Date    02 Jun 1799
Christening Place    TURTON,LANCASHIRE,ENGLAND
Father's Name    Richard Smith
Mother's Name    Susannah

Name    Richd. Smith
Gender    Male
Christening Date    02 Jun 1799
Christening Place    Bolton-le-Moors, Lancashire, England
Page Header    Bap. in Turton in the year 1899
Birthplace    Entwistle
Father's Name    Richd. Smith
Mother's Name    Susannah Smith

Richard Son of Richard & Susannah Smith of Entwistle, Weaver

Richard did no died in Westhoughton, aged 23.  That was another, son of John Smith:

Name:    Richard Smith
Age:    23
Birth Date:    abt 1799
Burial Date:    30 Sep 1822
Burial Place:    Deane, St Mary, Lancashire, England
Father:    John Smith
Reference Number:    GB127.L85/1/4/3
Abode: Westhoughton


Lancashire Death indexes for the years: 1870
SMITH    Richard    70    Western Bolton    WB/40/16