'TRACY, …
Esther, [d. Christopher & Lidia], b. Jan. 19, 1721/20 [1:53]'
Although the split year is written in an unusual format, it appears to refer to 1720/21, as the next sibling (Deborah) was born Apr 1722, and the previous two siblings were Dorothy (b. Jan 1720/19 - presumably meaning Jan 1719/20) and Bethiah (b. Jul 1718).