There's an article on Trove from May 1929 (
https://trove.nla.gov.au/newspaper/article/16555501?searchTerm=francis%20mccray) covering Francis' farewell dinner at Adams' Cafe prior to his departure for the UK. The dinner was organised by his boss, George G. Clarke, head of George G. Clarke Ltd and The Paraffines Companies Inc.
I don't know for sure, but is more than likely I think that Francis resumed working for Clarke's import-export business on his return from his posting. I'm wondering how likely it might be that records might survive of Francis' employment with the company from this mid-1930s period. Unlikely I suspect, but you never know! There might just be some reference to his residential address if there were any such records.
In the years after Francis' passing in 1945, the George G. Clarke Ltd business seemed to go from strength to strength judging by various Trove references through the 1950s and early 1960s. In September 1964, the company was taken over by Kolotex Holdings - just a month or so before George Gladstone Clarke himself passed away suddenly at his Sydney home.
Kolotex was then taken over in 1976 by JGL Investments Pty Limited. JGL Investments is still going strong apparently, a consumer goods company located at 161 Collins Street, Melbourne.
I very much doubt that JGL would have any resources that related to Francis' employment 90 years ago with a long-ago subsumed company. But might any such records have survived in some other form of corporate database? This is well outside my family history research expertise, but just thought I would ask the question to see if anybody had any suggestions.
Peter