- Marriage (1): Col John ALSTON of Wethersfield ESS & Nth Carolina America.  in 1701
Mary is recorded repetitiously as being Mary Clark but no marriage or evidence exists that this is the case.
Ref: Journal of Nth Carolina Genealogy 1965 No 43 Pg 1528
However Forrest King in 2017 suggests the following from his research, but accepts that while there is circumstantial reasons for Mary Baker no conclusive evidence presently exists:
A possible Mary as the wife of Col. John Alston
Col. John's wife Mary showed up only twice in the records as Mary (---) Alston, as a witness to a will and as a legatee in her husband's will in 1754. Mary was literate, which indicates she was probably from a higher class background.
Henry Baker Sr. had a daughter named Mary who would have been of the proper age and social standing to be the wife of Col. John. This Mary Baker is mentioned in the wills of her father Henry on 10 Jun 1709 and her mother Mary on 5 Mar 1732, but unfortunately not by last name. In those two wills, none of her sisters were mentioned by last name either.
A number of circumstantial items point to a marriage between Col. John and Mary Baker, daughter of Henry Baker Sr.:
John Alston of Surry County would have known Mary Baker because of his proximity to the Baker family at the time he would have married about 1700. Nicholas Pasfield, uncle to John, had several dealings with Henry Baker Sr. in Surry County as well.
Henry Baker Sr. owned land on Honey Pot Swamp near Bennett's Creek by 6 Jun 1699, near Col. John's first land purchase in 1713. Henry's sons Henry and Lawrence were also neighbors to Col. John. (See Map above)
Mary Baker was mentioned first of the daughters in the will of her father and received less than her sisters. It is very possible that she was married by 1709 and had previously received her dowry.
This marriage would better explain why Col. John Alston was a witness to Henry Baker Sr.'s power of attorney in 1703. Col. John would have been a son-in-law rather than just a casual witness when he journeyed to the colony general court.
Col. John had the appropriate social status that would allow him to marry a daughter of Henry Baker Sr.
Col. John and Henry Baker Jr. were witnesses on documents in Chowan County in 1721 and 1728. Henry Baker Jr. may have been present because of a personal request by Col. John. This last transaction was a slave sale followed by an assignment of the slave to Col. John. It was common in personal transactions to have a trusted relative present.
Col. John and Henry Baker Jr. were socially connected.
Col. John was the appraiser on Henry Baker Jr.'s estate. While not mandatory, it was common at the time to have either neighbors or relatives perform appraisals.
Col. John interacted with the Baker family for at least 40 years.
Henry Baker Sr. had eight children. Six of the children's names were used by Col. John Alston and Mary. Four of their eight children have the same names, and two other Baker names were given to Alston grandchildren.
Although Mary Baker, daughter of Henry Baker Sr., is found in one other will, this mention provides little or no information on her potential relationship to John Alston. Silvestra (Bennett) Hill in her will dated 7 Oct 1706 gave 550 acres in Isle of Wight County, Virginia to Mary (Blake) Baker, wife of Henry Baker Sr., upon Silvestra's death by 9 Jan 1706/1707. Silvestra's will stated that after Mary (Blake) Baker's death, the land was then to go to Mary's daughter Mary. Unfortunately, Mary the daughter does not have a last name mentioned in this will either.
Tracing the ownership of the land could help identify Mary Baker's husband. Unfortunately, there is very little available information about the description of this property. No further reference to the property is found in the Isle of Wight County land records through 1780. One possibility is that by the 1714 quit rents this land had ended up in the hands of James Day Jr., the great nephew of Silvestra, who at that time reported owning 1,300 acres of land in Isle of Wight; 750 acres descended to him from great-grandfather Edward Bennett through several individuals, while the origin of his other 550 acres is unexplained. The 1714 quit rents list is the only known tax list in Isle of Wight County from 1705 to 1780.
Forrest D. King firstname.lastname@example.org
Mary spouse Col John ALSTON of Wethersfield ESS & Nth Carolina America.  [MRIN: 1051], son of Solomon ALSTON  and Mary PASFIELD , in 1701. (Col John ALSTON of Wethersfield ESS & Nth Carolina America.  was christened on 16 Apr 1677 in Wethersfield ESS and died before Dec 1758.)