Hello, Sorry it has taken me so long to get back to you. Life has been well life, My 87 year old grandfather, a whitehurst wasin a car accident and things have been hectic since.
On Hillary, There are two possibles. Hillary the son of Batson Whitehurst Margaret Snaile Hillary the son of Simon Whitehurst Argent Cox
Batson Whithurst d. 1759 Margaret Nicholas Ellen (Possibly Russell)
If this is your Hillary there are several children to this marriage and many lines
Simon Whitehurst is more of an unknown there are several Simons in the proper generation It is however difficult to determine which on is married to Argent Cox. Cox is a FFV settler name but the Cox historians don't have an Argent listed. She is probably Daughter Cox somewhere. This marriage produced several children.
Hope this helps, I will continue hunting. C.A. Critchell