Got your email address, Steven, so will send that cert.
It's good that you got those credits as well! It all helps. When you get a freebie it allows you to look at the maybes as well as the definites.
I have my doubts that you will find the births of Donald and Flora. It's very likely that the book didn't survive. However, it could be that it is the same book as Roderick and John but the writing wasn't legible, the writing on the OPR for Roderick is far from clear. If that's the case then as people get better at transcribing the impossible, the image could well become available.