I'm trying to trace DH family.FIL's mother left the family when Fil was small.We have no idea who his father is,maybe a G.I from world war 2.
FIL is now 63,and found out about 6 years ago he had a sister.He was brought up by his grandmother and his aunt.
How can i try to trace details of his mother.I know she has most possible past away now but would like to fill some blanks in.
We know where FIL grandmother is buried so can get some details from her grave.i.e.date of death.
Thanks for any advice.