Hi Jerzy. Just read your post whilst looking for some information on wills and inheritences myself. I have a simlar dilema, that my family didn't seem to get their share of my great great grandfathers substantial property holdings in NSW when he died in 1928. I have done research at NSW State Archives before (I live about 1/2 hour away) and searched Probate Packets and deceased estate files. If memory serves me correctly, Probate Packets will give the run down of how ones estate was distributed according to the will, and also a copy of the will. I think the archives charge somewhere around 30 or 40 AUD for copies of them. Now, I'm no expert, but I think if they died intestate, then there might have been Letters of Administration granted to someone.
Did you search the links you were given? And did you find any reference numbers, or if he died with or without a will?
I will be going to the archives to look for my ancestor this weekend. If you would like me to look for your ancestor's probate packet/letters of administration then I would need his name, date, and place of death etc. Also what details you wish to get from the archives.
Let me know. Katharine.