Having seen those newspaper entries for criminal convictons and witnesses to crimes I went looking for matching entries in the
New Zealand Police Gazette, I have found Isabella in the 1879
New Zealand Gazette. These have been digitized and are available to view on Archway:
https://www.archway.archives.govt.nz/Home.doTo find them search Archway for 'police gazette'. You will get pages of results but go to page 7 (see bottom of each results page). Find the 1879 Gazette, then click the hyperlink, 'Click HERE to access digital record »'.
When the page opens click on the title button and be patient while it loads.
You will then see a page list on the left, all hyperlinked. The key to searching these records is to realise that each Gazette has one than one index, in this case a general index and another for Discharged Prisoners which in later years included photographs.
I found Isabella in the index for Discharged Prisoners H-L, and this referred me to page 22. Scroll down the page list and click on page 22, then look down the list of names for Isabella.
Use the page tools at the top of the page to rotate the image and zoom in.
Just one caution: don't assume the individuals' information is correct. They might not have told the truth!
Try searching other gazettes for matches to newspaper entries.
Have fun!
Spades