Thanks for that. I was interested whether the individual information for the censuses was available. You can see the personal cards used for the 1911 census at:
http://www.rootschat.com/links/0srv/ ** (page 11). Their destruction, until recently, makes sense why I couldn't find anything (I was thinking the 1901 and 1911 censuses might have been now available under a 100 years rule). Thanks re the electoral roll link - that was another line of enquiry. Does anyone know about pre-Commonwealth censuses in SA? For example, there was an Australia-wide census in 1881. Were the individual records for these similarly destroyed?
* Moderator comment: long link shrunk using the tool available here http://www.rootschat.com/links/index.php *