Phaedo numerous regions, some round smaller and shallower ones, then flow back into Tartarus, some at a point much lower than where they issued forth, others only a little way, but all of them at a lower point, some of them at the opposite side of the chasm, some on the same side; some flow in a wide circle round the earth once or many times like snakes, then go as far down as possible, then go back into the chasm of Tartarus.