"Nathaniel Hitchcock … m. New Haven 8 January 1670/1 Elizabeth Moss [NHVR 30]."
Some sort of error. Published New Haven vital records are consistent with Jacobus' data taken from the VR.
"Nathaniel (Hitchcock) … m 18 Jan 1670 (New Haven Vital Records) Elizabeth da. John Moss, …"
"Nathaniell Hitchcock & Elifabeth Mofs were marryed by mr Gilbert January 18th 1670"