You US people should know something...
The District of Hindmarsh is in Victoria Australia, not South Australia (A different State completely). There is a Hindmarsh in South Australia next to Adelaide (the capitol of the State) but its postcode is 5007 not 5733. The postcode 5733 is for Marree in South Australia, which is about 400km (about 280 miles) North of where the hospital could have been at Mile End.
The 5733 is the “page”
Do you know if South Australia uses a book / page system?