Hi Ann:
I'm sure my grandparents, Harry and Rose, kept in touch with William and Gilbert. My mother, unfortunately, no longer remembers much. She always thought Gilbert's name was Bert because that's what he was called. I spoke to her yesterday and she vaguely remembered hearing about Lillian's death. I personally have done much more research on my father's side and my mother's William Birch side.
Sorry, I couldn't be more helpful.
Cheers,
Linda