Name, age, place of birth, estimated year of birth of 1849, from the 1851 England Census taken on the night of 30 March 1851 for the parish of Gillingham, Village of Gillingham, Kent, England, found in May 2025:
Address: 89 Church Street, Gillingham
Catherine Bartlett, Head, age 73, Annuitant, Born: Rochester, Kent, England [circa 1879]
George Bartlett, Son, age 40, [Peuseouer?] Harrier, Born: Tillingbourne, Kent, England [circa 1811]
Frances Bartlett, Son's Wife, age 32, Dressmaker, Born: Wheaton Aston, Shropshire, England [circa 1819]
George Bartlett, Grandson, age 2, Born: Gillingham, Kent, England [circa 1849]

Name, date and place of death, place of burial, photo of George Henry Bartlett and Margaret Jane McDowell, from Find a Grave website found in May 2025:
https://www.findagrave.com/memorial/163845136/george_henry-bartlett
Name: George Henry Bartlett
Birth: 1849, Gillingham, Medway Unitary Authority, Kent, England
Death: 3 Sep 1915 (aged 65–66), Auckland, New Zealand
Burial: Waikaraka Cemetery, Ōnehunga, Auckland Council, Auckland, New Zealand
PLOT: Area 2 Block O Lot No 7
Aged 62 years
Son of George Bartlett & Francis Elizabeth Lawrence
Immigrated to NZ with his parents on the "Inchinnan" arriving in Auckland 14th January 1852.

Also, name of children from Find a Grave website found in May 2025:
George Henry Bartlett married Margaret Jane McDowell in Onehunga on 17th June 1875
Children -
1876 - Francis Rose
1878 - Elizabeth Jane
1881 - William John George
1883 - Mabel Emma
1885 - Andrew Richard
1892 - Ada Florence
1893 - Ethel May

The ‘Find a Grave’ page includes more children detail:
Frances Rose Bartlett 1876 - 1956 married Mr Abraham
Elizabeth Jane Bartlett 1879 - 1906 married Mr Lennard
William John George Bartlett 1881 - 1956
Andrew Richard Bartlett 1885 - 1917
Gertrude Emma Bartlett 1887 - 1963 married Mr Prior
Ada Florence Bartlett 1892 - 1973 married Mr Kelsall
Ethel May Bartlett 1893 - 1910

Record of burial from an Auckland Council cemetery search in May 2025:
Record for George Henry Bartlett
Date of birth: Unknown
Date of death: 3 September 1915
Age at death: 62 years
Gender: Male
Region: Central and Hauraki Gulf Islands
Cemetery name: Waikaraka Cemetery
Plot location: Waikaraka Cemetery, Area 2, Block O, Plot 007
Remains type: Body
Date of burial: 3 September 1915

Full date of birth of “10 April 1849”, from a PDF found in May 2025:
https://www.thebestlittlebookstore.nz/excerpts/bartlettexcerpt.pdf