Person:Sarah Loomis (1)

Name^[1]	Sarah Loomis
Gender	Female
Birth^[2]	Est 1617	Essex, England
Marriage	Bef 28 Sep 1640	Windsor, Hartford, Connecticut, United Statesto Nicholas Olmstead
Death^[1]	1667

References

↑ ^1.0 ^1.1 Olmsted, Henry King (1824-1896), and George Kemp Ward (1848-1937). Genealogy of the Olmsted Family in America: Embracing the Descendants of James and Richard Olmstead and Covering a Period of Nearly Three Centuries, 1632-1912. (New York: A. T. DeLaMare, 1912)
p 12.

'NICHOLAS OLMSTED. ... m. (1) Sept. 28, 1640, Sarah Loomis, of Windsor, Conn.; b. 1617; dau. of Joseph and Mary (White) Loomis; d. 1667;'
↑ Loomis, Elias; Elisha S Loomis; and Charles Arthur Hoppin. Descendants of Joseph Loomis in America, and His Antecedents in the Old World. (Berea, Ohio: Elisha Scott Loomis, 1909)
page 126.

'Sarah, b. 1617; m. Sep. 28, 1640, Capt. Nicholas, d. Aug. 1684, son of James and Joyce (Cornish) Olmsted of Hartford, ...'

The context makes it clear that the birth year is estimated.