Re: Long Family - Borden, Kent
I'm also descended from James Long (baptised 4 March 1798) and Ann Grigsby (baptised 28 September 1806) of Borden (married there in 13 October 1826). Like yours, my descent is through William Long and Sarah Ivory, in my case via their son William John Long (b 27 November 1865). I looked into this some time ago, so my knowledge is sketchy, but get in touch if you wish.
With all best wishes