Throughout the peninsula, I am informed by Mr.Byrne, the Government surveyor of the district, that as a general rule "_all the wells are below the sea level_." It would be useless to sink them in the higher ground, where they could only catch surface water.

The November rains fill them at once to the brim, but the water quickly subsides as the season becomes dry, and "_sinks to the uniform level, at which it remains fixed for the next nine or ten months_, unless when slightly affected by showers." "_No well below the sea level becomes dry of itself_," even in seasons of extreme and continued drought.

But the contents do not vary with the tides, the rise of which is so trifling that the distance from the ocean, and the slowness of filtration, renders its fluctuations imperceptible.
On the other hand, the well of Potoor, the phenomena of which indicate its direct connection with the sea, by means of a fissure or a channel beneath the arch of magnesian limestone, rises and falls a few inches in the course of every twelve hours.

Another well at Navokeiry, a short distance from it, does the same, whilst the well at Tillipalli is entirely unaffected as to its level by any rains, and exhibits no alteration of its depths on either monsoon.

ADMIRAL FITZROY, in his _Narrative of the Surveying Voyages of the Adventure and Beagle_, the expedition to which Mr.Darwin was attached, adverts to the phenomenon in connection with the fresh water found in the Coral Islands, and the rise and fall of the wells, and the flow and ebb of the tide.