I don't know how much of my documentation you want.  I'll start with Robert Walker's will.  Robert was the father of Elijah, Sarah and Judith Walker, as you know.  I'll continue until Elijah moves to Laurens County, South Carolina in 1800.

"Will of Robert Walker, 1766, Bedford County, Virginia Will Book
October the 23d 1766 In the Name of God Amen I Robert Walker of the County of Bedford being in a Low State of Helth Though in my proper Sences Blessed be God for it I do make my Last Will and Testament first of all I Desire all my Just Debts be paid and I desire that my Land Shall not be Sold I Desire Such things to be Sold as Shall be Seen proper by my Executers then my will and Desire is that Agatha Walker Shall have in possesion Tom and Joe and all my Movables Estate During her Life or Widdow Hood as Long as She Behaves Well and at her Death or Marrage shall fall from her then my Will and Desire is that my Son Elijah Walker Shall Heir Two Hundred Eacres of Land at the Uper end of the Land Where I Now Live to him and his Heirs forever and the Rest to be Divided amonge my wife and Two Daughters Saley and Judea to my Two Daughters and There Heirs forever then my Will and Desire is t hat I do Leave William Walker and Valentine Corley Executors of my Said Will and Testament then my Will and Desire is that there be no Appaisement of my Estate
Robert Walker
In the presents of us
James Walker, Andrew Turner, Henry Pigg"

Apparently, Robert died in 1767 as that is the year his will was probated in Bedford County, Virginia.

Here is a description of the land:

"The land was originally granted to John Macklannan by patent 26 Jun 1755 [VA
PB 31:459], and sold by him to Robert Walker on 9 Feb 1761 [Bedford
DB1:328].  In both documents, the land is described as "400a on both sides
of Callaway's Waggon Road and on the head of Reedy Creek."

Next, I found:

"Elijah Walker
Campbell County VA Personal Property Tax List 1791"

and then, Joseph and Agatha (Agnes in document) Simmons, Sally and Edward Baird, and Judith (Judah in document) and20Benjamin Martin sold their portion of the land.  They lived in Franklin County, Virginia at the time of the sale.

"Campbell Co. DB3:184, 5 Jun 1792
From: Joseph Simmons & ux, Agnes, Edward Baird & ux, Sally, and Benjamin
Martin & ux, Judah, all of Franklin County
To: James Hunter
For 120£; about 200 acres, it being all the remainder or balance of Land
whereon Elijah Walker now lives, and bounded by his dividing line when run
agreeable to his father Walker's Last Will and Testament, thence round the
old patent lines to said div line to first station. [only bounds given]"

Then, I had this bit of information:

"Notes on Southern States" WPA project.
John WALKER was born in Virginia 17 Jan 1789 (father was Elijah WALKER) removed to South Carolina in 1800 settled on west side of Reedy River in neighborhood of Brewerton."

And, last but not least, I have20a copy of the Grantor Deed, Campbell County, Virginia, in which Elijah and his wife, Elizabeth, sold their land in Virginia in 1800 before they moved to South Carolina.  Today this land is in Appomattox County, Virginia.  The county boundaries kept changing; however, the 1800 land is the exact same land that Robert Walker bought in 1755.  I have actually found and been to the land.  If you have access to Google Earth, put in "Phoebe Lake, Virginia"  and you will see where the land is located.  Phoebe Lake is a small pond on the property.  The land is near an East/West highway between Richmond and Lynchburg, Virginia.  I have not typed this Deed so I don't have anything to send to you at present.  If you want a copy, let me know and I'll see what I can do.

I believe Robert Walker is the son of a William Walker.  There is mention of a son, Robert, in William's will, but he is not mentioned in the will of Judith Walker, widow of William, when she wrote her will in 1767.  Perhaps she wrote her will after Robert died, but one would think she might have mentioned his children, which she didn't do.

Hope you enjoy all of the above and that it will help to prove your ancestry.

Agn es

P.S.  DNA testing supports descendancy from Robert for those of us who can prove we are descendants of Elijah and Elizabeth Simmons Walker.