Have you found Henry Jackson born c1862 in the 1911 census?
Possibility for 1911 census:
https://www.familysearch.org/ark:/61903/1:1:X7T4-M3SBirth reg:
JACKSON, HENRY mother's maiden name PEARS
GRO Reference: 1861 S Quarter in HULL Volume 09D Page 194
Baptism:
Name Henry Jackson
Residence Place Hull, York, England
Christening Date 04 Aug 1861
Christening Place Hull, York, England
Father's Name Henry Jackson
Mother's Name Hannah
Marriage for parents:
Dec Q 1850
Jackson Henry Hull 22 373
Pears Hannah Hull 22 373
Possible 1851 census:
Event Place Holy Trinity, Yorkshire,Yorkshire (East Riding), England
Registration District Hull
Residence Note Perseverance Place
Page Number 5
Registration Number HO107
Piece/Folio 2363 / 542
Head: Henry Jackson aged 29 born Selby Yorkshire occ: Marine Engineman
Wife: Hannah Jackson aged 29 born Barnby Yorkshire
Cousin: Hnery Thickett aged 24 born Selby Yorkshire occ: Mariner
Possible children:
Name Mary Hannah Jackson
Gender Female
Christening Date 26 Feb 1854
Christening Place HOLY TRINITY,KINGSTON UPON HULL,YORK,ENGLAND
Father's Name Henry Jackson
Mother's Name Hannah
Name Thomas Jackson
Residence Place Hull, York, England
Gender Male
Christening Date 06 Jan 1856
Christening Place Holy Trinity, Kingston-upon-Hull, York, England
Father's Name Henry Jackson
Mother's Name Hannah
Name Sarah Ann Jackson
Residence Place Hull, York, England
Gender Female
Christening Date 26 Jun 1859
Christening Place Holy Trinity Parish, Kingston-upon-Hull, York, England
Father's Name Henry Jackson
Mother's Name Hannah
Possible 1861 census: (Family name recorded as Derkson)
https://www.familysearch.org/ark:/61903/1:1:M7YV-BV5Possible 1871 census:
https://www.familysearch.org/ark:/61903/1:1:KD6P-NHTPossible 1891 census:
https://www.familysearch.org/ark:/61903/1:1:75JZ-SZMADDDED:Marriage details:
Date: 19th June 1886
Place: St John the Evangelist Leeds Yorkshire
Groom: Henry Jackson, aged 24, occ: Postal Clerk, abode: 42 Grafton Street
Bride: Martha Ann Roberts, aged 21, abode: 49 Call Lane
Groom's father: Henry Jackson occ: Marine Engineer<<<<<<<<<<<
Bride's father: Joseph Roberts occ: Publican
Witnesses: Richard Moxon Hird and
Sarah Ann Jackson>>>>>>>>>>>
<<<<<
Father's occupation matches with 1891 census (posted above)>>>>>>>>>
Possibly Henry's sister