Those innumerable groups of islands, keys and sandbanks, known as the West-Indies, are peculiarly adapted from their locality and formation, to be a favorite resort for pirates; many of them are composed of coral rocks, on which a few cocoa trees raise their lofty heads; where there is sufficient earth for vegetation between the interstices of the rocks, stunted brushwood grows. But a chief peculiarity of some of the islands, and which renders them suitable to those who frequent them as pirates, are the numerous caves with which the rocks are perforated; some of them are above high-water mark, but the majority with the sea water flowing in and out of them, in some cases merely rushing in at high-water filling deep pools, which are detached from each other when the tide recedes, in others with a sufficient depth of water to allow a large boat to float in. It is hardly necessary to observe how convenient the higher and dry caves are as receptacles for articles which are intended to be concealed, until an opportunity occurs to dispose of them. The Bahamas, themselves are a singular group of isles, reefs and quays; consisting of several hundred in number, and were the chief resort of pirates in old times, but now they are all rooted from them; they are low and not elevated, and are more than 600 miles in extent, cut up into numerous intricate passages and channels, full of sunken rocks and coral reefs. They afforded a sure retreat to desperadoes. Other islands are full of mountain fastnesses, where all pursuit can be eluded. Many of the low shores are skirted, and the islands covered by the mangrove, a singular tree, shooting fresh roots as it grows, which, when the tree is at its full age, may be found six or eight feet from the ground, to which the shoots gradually tend in regular succession; the leaf is very thick and stiff and about eight inches long and nine wide, the interval between the roots offer secure hiding places for those who are suddenly pursued. Another circumstance assists the pirate when pursued.--As the islands belong to several different nations, when pursued from one island he can pass to that under the jurisdiction of another power. And as permission must be got by those in pursuit of him, from the authorities of the island to land and take him, he thus gains time to secrete himself. A tropical climate is suited to a roving life, and liquor as well as dissolute women being in great abundance, to gratify him during his hours of relaxation, makes this a congenial region for the lawless.