I have three pictures of Martin Fry in front of me.
pages 328 & 329, Thoughts on the Kentucky Rifle in its Golden Age, Joe Kindig Jr 1960
page 34,The Kentucky Rifle . . . a True American Heritage in Picture, produced by the KRA 1967
The quality of photos here is excellent. A KRA man worked at the printer!
I did hear one (late) esteemed gentleman growl that they were "clinical" A compliment, though I don't believe he meant it that way.
Maybe other books, this is as far as I will dig for now.
A contemporary man interested in Kentucky rifles must, MUST have Kindig.
George Shumway's widow probably still sells this stuff, otherwise abebooks.com