For nearly 300 years these peaceful looking keys, with their bewildering net-work of channels, kept open by the rushing tide-currents, and coral reefs were the chosen resorts of pirates and wreckers, both of whom reaped rich rewards from the unfortunate vessels that fell into their hands. Now the pirates have disappeared, and the business of the wreckers has been largely taken from them by the establishment of a range of light-houses along the outer reef, at intervals of twenty to thirty miles. The first of these is on Loggerhead Key, the outermost of the Tortugas. Then comes Rebecca Shoal, half-way between Loggerhead and Sand Key Light, which is just off Key West. From here the lights in order up the reef are American Shoal, Sombrero, Alligator, Carysfort, and Fowey Rocks, off Cape Florida.