Thanks Geoff.
I didn't check for siblings when I looked at the fiche in the library.
I know nothing about Elizabeth BELL. I'm not even sure I have the right Arthur J although age at death could rule out two that are five or more years older. Death reg is not much help:
Death 17/1922 SCOTT ARTHUR J - JOHN - SYDNEY
The Sydney Morning Herald - Monday 9 January 1922 p.8
DEATHS
SCOTT.-January 7, 1922, at a private hospital, Darlinghurst, Arthur John, dearly beloved husband of Beatrice C. Scott.
SCOTT.-January 7, 1922, at a private hospital, Darlinghurst, Arthur John, dearly beloved father of Mrs. Jessie Loram of Colombo and Arthur J. Scott of Compton Downs, Hughenden, North Queensland, in his 62nd year.