I am wondering if you are still connected to Genealogy.com. I have recently started my family tree, and came across your reference to Robert Hickton in my internet searches.
I was born in Maryborough, Qld, Australia, and my paternal Grandmother was Dardenelle Neal. Her paternal Grandparents were Joshua Neal and Elizabeth New.
It is through Elizabeth New, that my paternal side is directly descended from Joseph Hickton (b.1739) and his wife Sarah Anne Bailey (b.1740). So far I think I have established that Josephs parents were John Hickton (b.1700) and Elizabeth Karlton (b.1704).
John Hickton's paternal Grandfather was a Sir George Hickton (b.1643), of Nottingham (where many of his descendants are also from)