Thus, Different Infectious Disorders Might Proceed From Peculiar Species Of Animalcules, Which, At Given Periods, Are Wafted Into Certain Countries, Carrying Pestilence And Death In Their Invisible Course.

A curious phenomenon has recently occurred at Mauritus, where that terrible scourge, the cholera, has been raging with desolating effect.

There is a bird in that island called the "martin," but it is more property the "mina." This bird is about the size of the starling, whose habits its possesses in a great degree. It exists in immense numbers, and is a grand destroyer of all insects. On this account it is seldom or never shot at, especially as it is a great comforter to all cattle, whose hides it entirely cleans from ticks and other vermin, remaining for many hours perched upon the back of one animal, while its bill is actively employed in searching out and destroying every insect.

During the prevalence of the cholera at Mauritius these birds disappeared. Such a circumstance had never before occurred, and the real cause of their departure is still a mystery.

May it not have been, that some species of insect upon which they fed had likewise migrated, and that certain noxious animalcules, which had been kept down by this class, had thus multiplied within the atmosphere until their numbers caused disease? All suppositions on such a subject must, however, remain in obscurity, as no proof can be adduced of their correctness. The time may arrive when science may successfully grapple with all human ailments, but hitherto that king of pestilence, the "cholera," has reduced the highest medical skill to miserable uncertainty.

Upon reconsidering the dangers of fevers, dysentery, etc., in the swampy and confined districts described, the naturalist may become somewhat less ardent in following his favorite pursuit. Of one fact I can assure him that no matter how great the natural strength of his constitution, the repeated exposure to the intense heat of the sun, the unhealthy districts that he will visit, the nights redolent of malaria, and the horrible water that he must occasionally drink, will gradually undermine the power of the strongest man. Both sportsman and naturalist in this must share alike.

No one who has not actually suffered from the effect can appreciate the misery of bad water in a tropical country, or the blessings of a cool, pure draught. I have been in districts of Ceylon where for sixteen or twenty miles not a drop of water is to be obtained fit for an animal to drink; not a tree to throw a few yards of shade upon the parching ground; nothing but stunted, thorny jungles and sandy, barren plains as far as the eye can reach; the yellow leaves crisp upon the withered branches, the wild fruits hardened for want of sap, all moisture robbed from vegetation by the pitiless drought of several months.

A day's work in such a country is hard indeed carrying a heavy rifle for some five-and-twenty miles, sometimes in deep sand, sometimes on good ground, but always exposed to the intensity of that blaze, added to the reflection from the sandy soil, and the total want of fresh air and water.

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