Regarding Augustus Radcliffe: (you wrote: marriage record 14 Feb 1843 at Parish Church of St Mary, Walton on the Hill, Lancashire of Robert QUIRK born 1819 to Mary Allgood RADCLIFFE b.1817 d.1854. Her father given as Augustus Radcliffe).
Another Radcliffe researcher has written:
"Was able to find some info. I think Mary was born in Eng probably Monmouth.
Augustus Radcliffe bpt 26 Feb 1792 Worcester s/o James adn Mary marr Sarah Price Allgood 28 Dec 1814 Trevethin Monmouth (patron )
Sarah bpt 24 Aug 1794 Monmouth d/o William Allgood & Mary Miles.
1841 Census Islington Liverpool
Augustus 45 merchant
Joseph Bailey Radcliffe bpt 31 Aug 1826 Christ Church Hunter St. Liverpool
Gertrude bpt 31 Aug 1826 Christ Church Hunter St Liverpool
1851 census Bilton with Harrogate
Augustus Radcliffe 59 widow, iron merchant, boarder Swans Hotel, b. Worcester
1861 census Wavertree Lanc
Augustus Radcliffe wid 69 Coal Pro____ b.Worcester
Eliz Stephenson un 40 Serv
Cath Magin 15 Serv
Hannah Molyuneux 42 Serv
Gertrude marr Andrew Duncan Dec 1850 West Derby vol 20 ,pg 955
Gertrude died Dec 1885 Oswestry vol 6a, pg 159
Andrew 50 Glascow Scotland merchant
1861 Oswestry Shropshire
Gertrude merchant's wife boarder 36 b.Liverpool
Gertrude Boarder marr 45 b.Liverpool
Gertrude wid boarder Annuitant b.Liverpool
Mary Allgood marr Robert Quirk Mar 1843 West Derby Vol 20 ,pg 666
Mary Allgood died Dec 1854 vol 8c pg 65 Wigan Greater Manchester."
She could not find them in the 1851 census, and thinks that Mary was born in Monmouth.
- So no sign yet of an IOM ancestor.