The Morrises were St Andrews men through and through. It's true that Old Tom left for Prestwick after a fallout with Allan Robertson over the (then) new Guttapercha ball. But he returned a few years later and became Custodian of the Links in St Andrews for the rest of his life. The rivalry in these times was not with Prestwick anyway, it was with Musselburgh, especially the Dunns.
Ulrich