Then we are closely related. My grandmother was Rena Murray nee Darby - born at Darby Hill 1899 - and would be your father's aunt.
I live in Massachusetts. But as a boy I spent many summers in Midland with her. And if I have the right Marjorie - my grandmother spoke of her often and I'm quite sure I visited her as a boy.
I've attached a picture of TH Darby w/ Mary Grigg. And I need to double check, but I think the second image is of Jim Henry - your grandfather
Please contact me through the Ancestry email. I would enjoy catching up. And I have a number of pictures you may be interested in seeing.