'Castle, Samuel, s. of Henry. Born abt. 1668, d. 2 Apr. 1707 in 29(?) yr. (g. s., Stratford). Married Susanna, widow of Samuel Nichols, previously widow of Thomas Fairchild, 2d.'
↑ Birth year estimated based on birth years of her husbands: 1646 (Thomas Fairchild), 1658 (Samuel Nichols) and about 1668 (Samuel Castle), and birth year of her first child (1672), assuming that she was the mother of all of Thomas Fairchild's children.
Ancestral File KWN6-TM gives her name as Sarah (Unknown), Sarah (Susan) Preston, or as Susannah (Unknown). There does not appear to be a basis for her first name being Sarah or her surname being Preston. Very little is known about her except that her first name was Susannah and that she married 3 times.