I am transcribing the St. Albans, Maine Vital Records for the Maine Genealogical Society. There is mention of several marriage and marriage intentions of Leech/Leach men and women. I do not see any Leech or Leach birth records. The name Mary Leech/Leach has not shown up in the records I have transcribed so far.
My Parkman ancestor was John, the brother of Gideon.