Bill Jessop lists 8 children for David and Miriam Marks - Gerald, Leonie, Lillah, Seaborn, Oscar, Vera, Hero and Hilda. However he shows David as the son of Solomon Marks and his wife Hannah, dau of Henry Cohen (Mel).

It seems possible to me that there is some confusion regarding whether this couple are listed with the correct parentage, particularly David Marks.

Lived 23 Palace Gate, London in 1908, in 1883 was the residentmanaging partner of S. Hoffnung & Co in Australia, thenm moved toEngland about 1895