Hi there,
I am delighted to see the scans.
I wonder if the person recording this may have been interested in charting horoscopes? I ponder this simply because in one of my forebears Family Bible ... well several of the entries include the "o'clock" times for births too. And, in my case, these also were for births in Sydney Town in the 1810s. The person who gifted that Family Bible to me had been very involved in family history searchings for decades prior to their death in the 1960s. So they did their research the 'old fashioned way', long before this hobby was at all popular. Their private papers show that they suspected that the 'o'clock' details were to help establish the exact latitude and longitude and time and position 'in the heavens' when each baby was born, and they presumed this was for their chart (no no no, not the family tree chart, but their ‘astrological chart’. So, for example I read that when one of my ggg grandmothers gave birth to her Sydney born children the Family Bible notes their name details and then the time and the exact location of the residence. In my case, those children's baptismal records (images at the NSW State Library, rather than the typed Early Church Records certificates from NSW BDM) show the occupation of their father.
So for example from the scans uploaded by Garvin, I read that Susanna Anabella Brown Daughter of WHQT Brown of His Majesty’s Government Hospital, Parramatta, was born on 11th January 1819 at 9 pm. And when her older brother (the chap that this thread is about, William Frances Dubock Brown), was born, WHQT Brown was ‘of Sydney’ (rather than at Parramatta). To my way of thinking, there’s quite a distance between Sydney Town and Parramatta in 1819 !
Of course, on other branches of my NSW forebears trees, I can at times have scant info, so I really appreciate the benefits that are available from Family Bibles.
Cheers, JM