Hello ciderdrinker...
You said:  
The settlers file for Gosford has her first marriage to Peter Hibbs 5.11.1791 Norfolk Island  and her second to Edward Scott.
+++ I have been researching the life and times of Peter Hibbs (and therefore, I guess, Mary Pardoe) for more than 25 years.  I will say it again... there is no official EVIDENCE anywhere that Mary Pardoe married ANYONE at all.  She had a child Ann Scott who was born six days before Mary Pardoe arrived in Australia.  Ann's father was a sailor (Edward Scott) on the ship.  Edward Scott did not stay in Australia. He was on the ship (Lady Julian/a) when it sailed away.  I have been told ad-nauseum that Mary Pardoe married Peter Hibbs on Norfolk Island on 5th November 1791 and I have challenged at least a hundred people to point me towards official documentation (church records etc?).  NONE has been been forthcoming.  The ONLY official record is that Reverend Johnson visited Norfolk Island and married over a hundred couples on 5th November 1791.  Just who those hundred happy couples were will NEVER be known.  Peter and Mary? Probably - but only probably - nothing more.
You said:she arrived on the Lady Juliana 5.11.1790.
+++  I think you will find that it arrived 3.6.1790.
You said: Buried Wiseman's Ferry
+++ She is buried beside Peter Hibbs at Laughtondale NSW.
You said: Children George,Peter,Peter Kennedy Hibbs,Joseph ,William,Sarah and Richard.
+++ Children: Ann (Scott, known as Hibbs) 1790, George 1792, Peter 1794-1798, Peter KENNEY 1800, William 1804, Sarah 1806, Richard 1808, Joseph 1811.
You said: Peter's entry born 24.1.1762 Swanage 
+++ Birth date unknown.  BAPTISED 24.1.1792.  Buried at Laughtondale NSW 14.9.1847
--- Allen