Hello Paul.
We may be related. My name is Edward Hynd and my Great, Great, Great grandfather was William Hynd who married May Ford.
I am Scottish but now live in Co Donegal, Ireland. I have a bit of a family tree for my side of the Hynd family.
The William you refer to had a son James, he in turn had a son James and this James also had a son James b born in 1913, this James was my father.
Regarding your Mary L Hynd, her full name may have been Mary Lavery Hynd.
My Grandmother was Mary Lavery Diamond and she married my grandfather James Hynd, whose address was given as Dundee in 1912.
My grandmother’s father was Robert Taylor Diamond and his family came from Stoneykirk. I think that Lavery families also came from that area.
Let me know if I am on the right track Paul. If you wish we can share information, I would be very happy to do that.
Regards, Ted Hynd