They were therefore the step-sisters of Heigham's elder daughters, and of similar ages to them, and were to become the half-sisters of the Heigham children by the second marriage. Estimates of the birthdate of John Higham, his first son by Anne, range between c. 1530 and c. 1540.
Given their relationship, the step-sisters were the same age as Heigham's elder daughters and would become half-sisters to his children through his second marriage. Estimates of John Higham's first son's birth date by Anne range from approximately 1530 to 1540.