John Thomas Bishop - Who is the Thomas Bishop Thomas Bishop who served in the 2nd Virginia Regiment in the Revolutionary War?

John Thomas Bishop's wife's name was Elizabeth Barber. She likely died in 1788 (according to most researchers), The Swem's Virginia Index says that the Thomas Bishop who served in the 2nd Virginia Regiment in the Revolutionary War had a wife named Sarah. I can find no evidence of that John Thomas Bishop ever had a wife named Sarah. John Thomas Bishop's son, Thomas John Bishop had a wife named Sarah, but any claim he was the 2d VA Regmt Thomas Bishop would require proof that his wife Sarah was still alive on the 17 day of November 1778 when the proceeding was held in Berkeley County, VA (now W. Va), According to all of the research I have seen, Sarah Bishop, wife of Thomas John, died in 1775.