Do you know what happened to him?
Richard Thomas Franklin Thompson Conway was married in Chesterfield RD in 1896, to Sarah Ann Wilkinson.
For info.
Richard & Sarah married in 
Chesterfield Registry OfficeIs this Richard on 1891 census?
Richard ConwayAge   20 occ Railway Clerk
Relationship   Lodger
Birth Place   
Newtonards, IrelandResidence Place   Hornsey, Hornsey, Middlesex, England
Piece   1059
Folio   92
Should Mr Conway be Frederick?
I see a likely family in 1891 1111/116 - living in Hertford.
These appear to be some of the birth reg.
CONWAY, RALPH  THOMPSON   mmn THOMPSON
GRO Reference: 1890  M Quarter in HERTFORD  Volume 03A  Page 542   
CONWAY, RUPERT  THOMPSON   mmn THOMPSON
GRO Reference: 1888  M Quarter in HERTFORD  Volume 03A  Page 529   
CONWAY, HENRY  WALTER   mmn THOMPSON
GRO Reference: 1884  M Quarter in ELHAM  Volume 02A  Page 1039   
1911 census living in Sheffield surname transcribed as CONNAY
Frederick CONWAY b1843 
Harefield Middlesex & Rose Anne b1853 married 40 years 
12 children, 7 living 5 died
Is this her death?
CONWAY, ROSE  ANN   age 78
GRO Reference: 1931  J Quarter in ECCLESALL BIERLOW  Volume 09C  Page 432   
Not seeing a Rose Ann CONWAY on 1921 census but there is a Rose Ann THOMPSON born c1851 Armagh Ireland living in Yorkshire
When did Thomas Franklin Thompson  or Frederick Conway die ? 

 There is a 
Frederick Conway born c 1843 Pancras on the 1851/61 censuses with parents
William, cab driver & Lousia (nee FREWIN)
CONWAY, FREDERICK       mmn FR...IN  
GRO Reference: 1844  M Quarter in SAINT PANCRAS  Volume 01  Page 316
Fred. ConwayBaptism 
29 Nov 1877 Buttevant, Ireland
Father   
Fred. Conway Mother 
Rose Ann