Col John Thacher & mis Lydiah Thacher were Joyned in marige the 1st day of January in the year of our lord : 1683 ... Beniamin Thacher was borne the 25th day of July 1702 : marcy Thacher was borne the 7th day of february : 1703/2 [Ed. note: "sic". One would be tempted to interpret 1703/2 as 1702/3, but that would put Mercy's birth only 6.5 months after Benjamin. Given the odd syntax of the double dating, it is likely that this date was meant to be 7 Feb 1703/4. Then there would be no conflict with either Benjamin nor with the following birth of Thomas in April 1705. Not only can you not use 1702/03 without causing a conflict with Benjamin, you cannot use 1701/02 for the same reason.]
Mercy Thacher [p. 42:83: 3rd daughter of this name], d/o John Thacher and 2nd wife Lydia Gorham, b. Yarmouth 7 Feb 1702-3 [but see disucssion here ], d. ---, m. "in her 36th year" James Harris [so about 1738].