One evening I heard a strange rumbling noise, and at the same time the house shook slightly.

Thinking it might be thunder, I asked, "What is that ?" "It is an earthquake," answered Inchi Daud, my host; and he then told me that slight shocks were occasionally felt there, but he had never known them to be severe.

This happened on the day of the last quarter of the moon, and consequently when tides were low and the surf usually at its weakest.
On inquiry afterwards at Ampanam, I found that no earthquake had been noticed, but that on one night there had been a very heavy surf, which shook the house, and the next day there was a very high tide, the water having flooded Mr.Carter's premises, higher than he had ever known it before.

These unusual tides occur every now and then, and are not thought much of; but by careful inquiry I ascertained that the surf had occurred on the very night I had felt the earthquake at Labuan Tring, nearly twenty miles off.

This would seem to indicate, that although the ordinary heavy surf may be due to the swell of the great Southern Ocean confined in a narrow channel, combined with a peculiar form of bottom near the shore, yet the sudden heavy surfs and high tides that occur occasionally in perfectly calm weather, may be due to slight upheavals of the ocean-bed in this eminently volcanic region..