Don't know how I missed that 1883 marriage, I thought I checked through all the Clooney spelling variations for 30 years. That is probably her. Since she would have been well over 30 at the time of that second marriage, I would not expect many children. There do not seem to have been any children of her marriage to Alfred Cluney. ( no doubt someone will find one within ten minutes ).
There are births for Cluny(one) and Cluney(about 7) between 1868 and 1878 but none for Alfred and Elizabeth. And curiously, no Clooney births in NSW between 1868 and 1878 which I find hard to believe as that is by far the most common spelling.
Most of the other Dalzell's children in the 1870's would appear to be the children of her four brothers ( Alfred Cluney's brothers-in-law, all named in the 1873 funeral announcement ).
""The friends of Messrs Thomas, John, James and Robert Dazell (sic)
are invited to attend the Funeral of their late deceased Brother-in-Law,
Mr Alfred Cluney, to move from his late residence, No. 711, George-street
This(Monday) Afternoon at quarter to 3 o'clock, for Necropolis
J and G Shying."
Their father was also called John.
I will order some transscriptions of their certificates, to find out where they came from. The one who drowned at Long Reef was a Shetland Islander.