Is this them in 1911 Census (Note marriage date)
Name Henry John Atkinson
Sex Male
Age 61
Birth Year (Estimated) 1850
Birthplace Lincoln, Lincolnshire
Marital Status Married
Number in Family 3
Years Married 41
Relationship to Head of Household Head
Marriage Date 1870Event Type Census
Event Date 1911
Event Place Grimsby, Lincolnshire, England, United Kingdom
Sub-District Great Grimsby
Household Identifier 199480625
Record Type Household
Document Type 3
Line Number 1
Page Number 1
Source Page Type 6
Piece/Folio 625
Registration Number RG14
Schedule Type 324
Spouses
Emma Atkinson Wife F 62 Barton On Hamber, Lincolnshire
https://www.familysearch.org/ark:/61903/1:1:X7YF-BZ8?lang=en