Hi Millie (and Trish),
I went to the Archives today but only had a little time left to ask the archivist about prision records. She said "possibly" and pointed towards the row of PC's (I think they have the State Archives website on them, possibly the link that Trish posted above - but not sure).
Anyhow, I will be going to the archives again probably later in the week so let me know if you like anything looked up.
I did manage to find this information which you may or may not already have:
Archibald Spencer Anderson died 25-11-1910 father William Anderson, mother Agnes McGilchrist.
Agnes Gilchrist Spencer Anderson born 16-7-1889 father Archibald Spencer Anderson, mother Elizabeth Leitch Smith.
Margaret Anderson born 19-3-1886 same parents as Agnes. I couldn't see any other children but there are zillions of Andersons, and, surprisingly, a few other Archibalds.