I have heard that rolling was a maintenance practice that was "heavily" used in the early years, but that it lost favor until recently. I had always wondered about this and was surprised to find out how they did infact roll the greens back then. They were rolling greens with some pretty serious contraptions that in the early years were steam powered. I have come across a number of pictures that show them in action and it is a sight to behold. I would think that they were trying to eleviate some of the damage in the fwys caused by the horses that were used to pull the fwy mowers.
Coupled with the firm(dry) conditions and the lack of water(irrigation, rain, and coverage issues) they must of had some pretty compacted soils.