↑ "Records of the Society of Friends of the City of New York and Vicinity, from 1640 to 1800", in The New York Genealogical and Biographical Record. (New York, New York: New York Genealogical and Biographical Society) vol. 4, p. 194.
The Births of the children of John and Mary Willet: ... Helena Willet was born the 17th of the 4 m. 1729 about 8 o'clock in the morning ye 3'd day of the week. [Note: In old-styles dates, the fourth month is June. More info may be found here.]