It is a lovely story and great research but it seemed strange that the Muddle account doesn't mention the two girls, when the one above of brother Frank does mention his children. Verification of those two girls would be the icing on the cake.
According to the 1939 register then Kathleen was single and not married.
Doesn't seem to be a record of the two girls in the UK. If they exist they are hopefully still alive.
The Muddle account refers to Robert having one son.
Mrs Robert Hall - housewife - lived with Herbert Hamlin (trucker) and Mrs Herbert Hamlin in Peterborough Ontario, Lenna Nee Jones Hamlin died November 1946.
Father of Helen Margaret Hamlin/Hall - HAMLIN, Herbert Edward (h/o Lena May) Little Lake, Peterborough (Section O) Peterborough Monaghan North KW-P-217-O
Mother of Helene Margaret Hamlin/Hall - HAMLIN, Lena May (w/o Herbert Edward) Little Lake, Peterborough (Section O) Peterborough Monaghan North KW-P-217-O
Sister of Helen Margaret Hamlin/Hall - HAMLIN, Muriel Grace (d/o Herbert Edw. Lena May) Little Lake, Peterborough (Section O) Peterborough Monaghan North KW-P-217-O
Brother of Helen Margaret Hamlin/Hall - HAMLIN, Herbert Clayton (s/o Herbert Edw. Lena May) Little Lake, Peterborough (Section O) Peterborough Monaghan North KW-P-217-O
Sandra