"The 'Rough Stuff' model was first produced by the Brothers in 1953, and was made from the 1-1 drawings a Nature Photographer drafted and gave to them. Camera equipment was heavy; and he wanted to take it back country in the "roof stoof" It has the major design elements of a modern mountain bike: small diameter wheels, a high bottom bracket, a sloping top tube, cantilever brakes. and triple chainrings."
More info on that Jack Taylor...