Monica,
How old is Mary? Mary Agnes Hall married a Moses Copland but she was born abt 1857 so is too early. They had son who was Moses, plus others. The family moved to california USA and then Florida.
If this is of no help, what I was thinking was that go a little further back and work forward. If anyone wishes to take a look at the information I have, which may or may not help, they can contact me and I can have a word with Yvonne whose family connections these are more than my own.
marcie