Re: National guage standardisation - why 4'8.5"?

["Bradley Torr" <truenorth@one.net.au.SPAMTRAP>]

Dave Proctor <daproc@spambait.ozemail.com.au> wrote in article
<mNWC6.158218$r55.9659953@news5.aus1.giganews.com>...

> Three had 3'6" - WA, SA and Qld.

Why did South Australia have two guages within the state?

I know that the Port Lincoln system is 3'6" but that's isolated from the
rest of the state's railway network.

When were all the other 3'6" lines converted to 5'3"?

Regards
BT