Hello Jo,
Not sure whether you're still monitoring this thread or not.
If you are, I wonder if you might have a peek to see if you can find any Frater (or Fratter) family members who lived in Meadowmill, Tranent. I know at least 2 of the kids died in tragic circumstances in Edinburgh Royal Infirmary, but they may have been buried back in Tranent.
Thank you,
Gordon.