She is the 2nd wife of John Clark, of Hartford, Saybrook and died at Milford in Feb 1673/4.
I propose that this profile be combined with Mary Clark (Ward) because there is no record of John Clark of Hartford marrying a Mary Coley. His first wife was supposedly an Elizabeth.
In the will of John Clark of Hartford, Saybrook and Milford, he mentions a brother Coley, but only in fellowship, not marriage.
John Clark, of Hartford, Saybrook & Milford
Mary Clark