"Thomas3 Welles, III (Thomas2, Gov. Thomas1), … married c. 1689 Mary Blackleach, daughter of John Blackleach and Elizabeth (_____), born c. 1662 in Wethersfield, Connecticut. … The widow Mary married, second, in 1695 John Olcott (Barbour citing VR 3:169-170); and, third, after 1712, as his second wife, Capt. Joseph Wadsworth (FEH 617) who died in 1729.
The will of John Blackleach of Wethersfield, dated 3 September 1703, provides all his estate to his wife Elizabeth to settle as she wishes. It names none of the children (Hartford Probate District, Connecticut Estate Files, docket no. 612). Elizabeth Blackleach left a noncupative will in 1708 that gave everything to Mary Olcott (Hartford Probate District, Connecticut Estate Files, docket no. 609)."