Very much speculation...
A marriage in Sep 1933, Salford 8d 1111
Robert Brown
+
Frances Thornhill
Salford Register Office or Registrar Attended (Lancashire BMD)
A birth reg
THORNHILL, FRANCES
Mother's Maiden Surname: HUDSON
GRO Reference: 1910 J Quarter in SALFORD Volume 08D Page 159
Free index to 1911 census
https://www.familysearch.org/ark:/61903/1:1:XW1Q-ZZNAn army record for Alfred Thornhill, her father.
Says Frances born 24.4.1910
Pop that date into the 1939 Register free index
Frances Brown, b 1910, in Salford C.B., Lancashire
Address 50 Walmer Street, Bury
But is husband there? We are not allowed to do look ups in that!
Death
June qtr 1975 Salford 39 0926
Brown, Frances
d-o-b 24 April 1910
She seems to have been buried 30 May 1975, G Manchester
died 23 May
One other in grave
I think again it is at Agecroft.
Could the other person be her husband, Robert Brown?