Hi Tom
You asked me earlier
"where did your Doolans come from? when did they arrive?" which had me double checking my findings.
To this question I have no proof whatsoever so I have been checking.
From the death & marriage records I have no parents names but I can establish a approx birth date of 1831.
From the Assisted Immigrants records I find a John Doolan arrived Sydney on the David McIver 1852 with a recorded age of 20 which indicates a birth year of 1832 so one can presume that I have the correct John Doolan.
My records reveal a birth in London however I have found nothing to support this so for now it is not proven. Looking at the shipping records of the David McIver It departed Liverpool and went to Plymouth before heading to Australia.
Unfortunately at present I can not access our Australian "Assisted Immigrants list" to find the image from the actual register (1852 David McIver) to double check things but it could be simply something in my upgrade to Win 10 so possibly somebody else may find his "Native Place" from the record
https://www.records.nsw.gov.au/archives/collections-and-research/guides-and-indexes/assisted-immigrants-digital-shipping-listsI do know they were Catholic and with the name Doolan I expect it will be Ireland.
Rob