"52. Thankful (Doolittle) b. (Middletown) June 3, 1702, prob. m. John s. of David and Sarah (Rockwell) Hall, b. May 9, 1678, at W."
Jacobus says this John Hall died young (FANH 3:695) and can't be her husband.
Jacobus published this later
Donald Lines Jacobus, "Bacon of Middletown and Simsbury" in The American Genealogist. New Haven, CT: D. L. Jacobus, 1937-. (Online database. AmericanAncestors.org. New England Historic Genealogical Society, 2009 - .), Vol 47 p 238.
This Thankful Bacon did not as suggest previously marry John Hall. She married Josiah Bacon