Also on Trove ("Cairns Post" 3 Nov 1928) is reference to a Mrs Margaret Topping (this would have been before the 1933 marriage) of the Clifton Boarding House, Cairns, giving evidence in another divorce case.

I wonder if Margaret just lived at the the Clifton Boarding House or if she ran it, and, if so, could have originally been run by one or both of her parents?

I'll keep checking.

Gloria