from Arnold's Vital Records of RI: from Providence Gazette 7 Dec 1799, death reported of Phebe Jacobs, wife of John, died age 37
from Providence Gazette 6 Jun 1815, death reported of John Jacobs, at Seekonk, 52nd year, killed by a blast of rock at Kettle Point; left mother, sister, widow, and 7 children to mourn his loss
from Rehoboth VR: intentions for John Jacob Jr. of Rehoboth and Phebe Briggs of Berkeley 30 Sep 1797
In the book, Clement Briggs of Plymouth by Edna Anne Hannibal and Claude W. Barlow, it is SPECULATED that Phebe Briggs, dau. of Jothom Briggs and wife, Phebe, b 1771 was perhaps the Phebe Briggs who mar. John Jacobs.If her reported age at death is correct (37), Phebe Jacobs was a decade too old to be this Phebe.