I would get your father tested and see what matches you get. If you don't get anything close and you have a lead on this Marion Pond, you might want to contact some of her kin people and ask them to test also, that is IF you don't get any matches to them. Hopefully some of them have already tested. If her kin people come up as close kin you would know you are on the right track. Some of them may know something of the story, also.