How wonderful is Rootschat, that I can find lots more on Theophilus Carolus, 5 years after this original post. Thank you
And to add to the mystery of the workings of the World Matrimonial Agency, 471 Pitt St, Sydney, my great grandparents John Fahey (50) and Amy Elizabeth Dale (32) (both single) were married there 23 July 1900. He Catholic, she Protestant. He from Reids Flat (Boorowa), she from Woollahra. By this stage they had 4 children, only 1 registered as 'Unknown DALE'.
Presiding over the marriage was Seraphim Phocas (Greek Orthodox Priest), Witnesses Theophilus CAROLUS and Joice JONES.
The Agency seems the only place these two could be joined as husband and wife, given the complexity of their life together thus far!