Mike -
Look at Ross's field sketches for ACC. He shows playing corridors, fw bunkers, but does not indicate rough.
Brad Klein pointed out a while back that what we understand today as rough is a by-product of modern irrigation. I think he's right. The rough typically seen on any good course today would stun Donald Ross and other ODG's. Their idea of rough was wispy, unmaintained, sparse turf.
Joshua Crane in the mid-20's was promoting rough as a way to "control" shots. He also favored graduated roughs (Ring any bells?) Behr, MacKenzie and others opposed such ideas. So the concept was clearly around during the GA.
The thing is, nobody back then would have imagined in their wildest dreams the thick, dense roughs we see today.
Bob