Courses tended to exhibit less formal design intervention and instead tended to be laid out on extant terrain with pre-existing hazards incorporated, including stone walls, roads, and watercourses. Courses often moved from year to year depending upon whose land was available, playing over grazing lands and estate lawns. Greens were often made of sand and doubled as teeing grounds. A handful of courses involved design modifications such as sodded greens located on hillsides or with undulating lateral and greenside bunkers, but these were the exceptions. Livestock were the primary means of trimming grass.