I would like to congratulate you on a charming and interesting site dedicated to a fantastic artist. My father, Gregor Grant was also a hill climber and i would imagine that they may have met although he went to the Glasgow school of art and then went on to draw for the glasgow herald. My mother spent her honeymoon at a scottish hillclimb in 1938 so i found the photos very interesting.
I wish you luck in tracing your father' work.
Simone Grant, Scotland