I am a descendant of Margaret Glassford (Mrs Alexander Cunningham) who is most likely the daughter of John Glassford and Mary Humphrey. I have never been able to verify that Margaret is their daughter (she died young in 1826) although her second son was John. She also had a grandaughter named Mary but Alexander Cunningham had a sister Mary so the Mary may come from the Cunningham side of the family? If you ever find out that John Glassford and Mary Humphrey DID have a daughter Margaret please let me know! Do you know who Mary Humphrey's parents were? Is Humphrey her previous husband's name or a maiden name?