Still working on this part of my family, and I have a couple of certificates of the kids. I would love to know how you know the Mmn is either Ellis or Swine on the certificates. Do you have copies of them? I'm still not sold on the Swine/Ellis link and am trying desperately to make your research fit as I think it's very probable, but I need to convince myself more! Would love to work with you on this, I'm located in the London area and am always going to the metropolitan archives