The shipping records I found were from the NSW gov't site link to ships and mariners in Australian waters. I also found a link through Cora Web site If you know the name of the ship you are looking for, you can download the passenger info etc One day either side is neither here nor there.... the ship probably arrived 23 and clerk filled out paper work day after... who knows? The other information came from immigration records on reel AONSW1345 relating to bounty details for George Munro, wife Mary and son George and two daughters, Cathrine and Elizabeth.Ten pounds for son, and five for each daughter William Sutherland and Thomas Dale certified for them and 58 pounds cost for George and Mary to come out to Aus.They settled (for a time anyway) in the Clywdd Valley Bowenfels, NSW and daughter born was baptised there (Presbyterian).
I use Scotland's People, Genuki, Australian, Uk and Scotland National Archives, Family Search.org as well as Ancestry, and their links and reading rooms. Unfortunately it all takes time and usually costs money, as you would know, and my research hits are few, and it seems that as soon as I find a promising lead, my credit expires, so I leave it until I have more time to devote to it.
I have tried genealogy forums, asking questions and learning more about where and how to look etc and even google (I found a family website for the Elkington line of my family that goes back even further than the Wenban line).Time is the main issue. I also put an enquiry on the Scottish and Australian Clan Munro websites and have found some help with Edinburgh City archives. I was thinking the info re William Munro might not be relevant, or perhaps he might be a relative of George Munro's father Daniel, but have not taken that any further for the moment.
As to why George Munro married a woman born Isle of Bute? I found that Mary was employed as a house servant. Given that she was born abt.1808, she would have been about 25 when she married George. Bute is close proximity to Glasgow and it is reasonable to expect that Mary went to the city for work. George was a coachman and as coach was means of travel to and fro London, Edinburgh, Glasgow, etc, he probably travelled quite a bit and spent some time between locations. His family lived in Edinburgh, so is reasonable to expect that once married, he would take his new wife back there to settle. I hope to learn more about Mary Thompson's family through county links in Genuki. There is a veritable plethora of information out there, but is like searching for a needle in a haystack. Hopefully one of my sons who will be going to Edinburgh University shortly might help me. His paternal gr grandfather came from Scotland and I have been encouraging him to take an interest, but he has his own priorities. Another son visited Scotland when in UK on business a while back, but was more interested in searching for the Loch Ness monster than spending time searching historical archives for his mother!
I am satisfied that Mary Thompson was Catherine's mother. After having another look at Catherine's death certificate,it doesn't actually say "unknown" for details re her mother, it just says "no information". Catherine died from "apoplexy" 7 hours after the doctor first came, so her death at 56 was quite sudden I guess. She was living at Spring St Waverley, same as son Ebb Wenban and he was the informant. I imagine at the time Ebb could possibly have been more than a little flustered and didn't provide all details. I have searched the NSW historical indexes for George Munro and have found a few possibles that might shed irrefutable light on his origins. The immigration records stated his father to be a soldier by occupation named Daniel Munro (dead) and his mother to be Jane Graham (dead). Parish records in Edinburgh show a Daniel Munro and Jane Graham to have had a son named George Munro 18th Feb 1807. This date is consistent with age records for George found elsewhere. This is another line I intend to follow when time and money permit.
As you have suggested, Cathrine's origins are of more interest to me... she was my gr grandmother, so I have a more vested interest in the search for her origins.