Hi there
I am uploading three snips. These are from the 1920s maps used by the Surveyors and by legal bods when transferring land etc. They can be difficult to read if you are not familiar with conveyencing matters in NSW. I am fairly sure that the locality you are asking about was once owned by a FITZPATRICK, and that your George POWELL was overseer on that property when your James was born there.
In past years, the Land Titles Office along with the Births, Deaths and Marriages Registers were all part of the NSW Registrar General's Office. Nowadays, Lands Titles Office is in private hands.
Two threads to help your research:
https://www.rootschat.com/forum/index.php?topic=678243.0 online alpha list of localities in NSW
https://www.rootschat.com/forum/index.php?topic=777978.0 NSW land searchings. - noting changes in name of the private organisation - currently (March 2022) it is Land Registry Services.
WATCH MY EXACT SPELLING
Cowcumbla Tank P.W.P.
Civil Parish of Cootamundra
County of Harden
Land District of Cootamundra
Pastures Protection District of Gundagai
Local Government Authority of Jindalee Shire
(P.W.P. = NSW gobblegook for Public Works & Procurement as per 1912 Act).
JM