"Parking" the note here to assist the Harcourt situation.
According to Austin's Gen. Dict. of RI, p. 156, Richard Harcurt married 1st Elizabeth Potter, daughter of Robert Potter and Isabel Anthony (as shown by induction) daughter of John and Susannah Anthony of Portsmouth, Rhode Island, Inn Keeper, etc.
'''HE DID NOT MARRY ELIZABETH MARSHALL. ELIZABETH POTTER'S MOTHER IS ISABEL ANTHONY
'''see below: a GEDCOM file is not a valid source''''''