Family history info for Roslyn Lang?

My name is Roslyn Lang, my Grandmother was Mary Gray, her Parents were Robert & Margaret Gray and she lived in Garvald till approx. 1908. She travelled to Sydney, Aust. and later met and married Robert Scott Stewart, who was from Helensburgh, Scotland. They had one child, my father, who was also Robert Scott Stewart. If anyone has any information about Mary Gray I would appreciate it. I would like to know her family’s address in Garvald if that is possible. I intend to come back to Garvald again & would like to know where she lived.

Thanking you, Roslyn Lang