'Mary Graves (7) was born in England. She married Moses Ventrous (or Ventris or Ventres) on 14 Jan. 1646/7 in Hartford, Conn. There is some uncertainty about Mary's name, and even whether she is a Graves. The Hartford Times, 18 July 1966 states: Moses Ventrous married Grace _____ on 14 Jan. 1647. A marriage record at Hartford states the same thing. Judd's History of Hatfield, Mass. says Moses Ventrous married 14 Jan. 1647 Mary Graves, daughter of Thomas Graves who married Sarah _____.'
This source appears to be incorrect in citing History of Hatfield by Judd - Neither A History of Hadley: including the early history of Hatfield, ... by Sylvester Judd nor A History of Hatfield Massachusetts by Daniel White Wells and Reuben Field Wells mentions Moses Ventrous/Ventres/Ventris.
The marriage record in Hartford VRs (Barbour Collection) does not give Grace's last name. There appears to be no evidence that it was Graves.