Publication: Mayflower Families Through Five Generations (vol. 12: Francis Cooke). 2008 rev. ed. 2nd printing. Picton Press, Rockland, Maine. 716pp.
Citation Details:  p. 26
  Text: Born either in Plymouth between May 1624 ‎[i.e., nine months after her mother Hester arrived in Plymouth on the Anne]‎ and 22 May 1627 ‎[when Hester is specifically named in the Division of Cattle]‎, or alternatively Hester may have been born in Leyden prior to April 1621 ‎[since Hester\'s husband Francis Cooke set sail on the Mayflower in July 1620]‎.
Presuming at least a 15 month separation between the births of Hester and Mary, if Hester was born in Plymouth, then it is likely she was born in the latter part of 1624 or in the year 1625.
...If Hester was born in Plymouth, then her older sister Elizabeth must have been one of the three, unnamed, Cooke child who arrived in Plymouth with her mother on the Anne in August 1623.