by high walls and terraces of the [30] new ash indicating the extent to which the gorge was filled by lapilli from the late eruption. A lava bed exposed in the bottom of the chan- nel near where the river emerges from the foothills and where it was flooded as an anchorage for the chain which in the pre-eruption days supported the pipe carrying millwater to the Orange Hill estate shows that the stream is now flowing in places at its old level but the coating of new material covering most of the bottom of the gorge shows that the Rabacca has not yet com- pleted the task of carrying to the sea all the fresh ash that is likely soon to go. The heavier floods still undermine the bordering banks