(Why was there an all-male jury? According to 18th century American law, only male property owners could vote, and only those who voted could serve on juries.)

The official record tells us nothing about what was said in court.

Most probably it came down to a case of his word versus her word. Since Judge North was a prominent member of the community and Rebecca Foster was the wife of a discredited minister, one could argue that the verdict was predictable, no matter what evidence was presented.