"Lydia Higgins ye Relict of Benjamin Higgins" made oath to his inventory on 24 June 1691 so still living as of that date.
↑Source:Dudley, Dean. History and Genealogy of the Bangs Family in America, p. 15, has the will of Edward Bangs, which names Lydia second among six living daughters, between Sarah and Hannah. Lydia m. 1661, which suggests born bef. 1643 to be of legal age (18). Sister Hannah m. 1662, which suggests she was born bef. 1644 to be of legal age so Lydia's birth could not easily be much later than 1643.