1. The water-mill goes round and round.

2. How did the output of the water mill compare with that of other mills?

3. Vitruvius’ water mill, on the other hand, could grind some 300 to 400 pounds [150-200 kg] per hour.

4. Some of the wildlife of the water-mill may owe its existence to a rather more conscious decision on the part of some long-dead miller.