HI
Just doing a little more digging and came up with:-
1903 Darlington Polling Place
https://www.ihr.com.au/secure/docimages/nswer1903/nswer1903_09614.gifALEXANDER BROWN, clerk, 20 Darlington Rd Darlington
also at this address are Phillip a clerk also and Eliza.
So I know he is/was a Clerk at some stage and this MAY fit in with him possibly working at Anthony Hordens!!
From the Sands Sydney Directory 1905 Alexander is still at 20 Darlington Rd Darlington
From the 1910 Sands Alphabetical directory there are two possibles
Alexander BROWN at 180 Rose St. Darlington AND
Alexander BROWN at 10 Victoria St LEWISHAM.
That's as far as I got to add to the timeline.
I hope everyone has a peaceful, safe and very Happy Easter. Kindest regards Dianna