Found a possible lead to Harry's other family
This family tree has him listed, if you go to address below and SELECT: John (where it says Person ID) and it will give you an email address. It might be worth a try. It says he has 1 living female child. The Robyn who died age 6 and is buried in same cemetery as him appears to be his daughter.http://testing.lisaandroger.com/getperson.php?personID=I1544...
If you contact me off line I may have a lead. email firstname.lastname@example.org