'JOSEPH LOOMIS ... m. 1st, Sept. 17, 1646, Sarah, bapt. Feb. 2, 1621, d. Aug 23, 1653, eldest dau. of Wm. and Phillis ... Hill, of Windsor'
The baptism information appears to belong to a different Sarah Hill (possibly baptized in Essex, England according to the Ancestral File). GMB indicates that the baptismal record of the Sarah Hill who married Joseph Loomis has not been found. The identification of her parents is also incorrect, according to GMB.
The date of death is suspicious, as her mother-in-law, the wife of Joseph Loomis, Sr., was buried Aug 23 1652 [WVR]. The year of death might or might not be correct. Torrey repeats it, but that might just be a reflection of how the book was compiled (based on Torrey's bibliography).