New technology and the wrecking trade
It used to be, along some hazardous sea coasts, that people could make good money by helping themselves to valuable goods and materials from wrecked ships. But in the nineteenth century the supply of shipwrecks dried up, as more lighthouses were built and lighthouse technology improved.
Wreckers were numerous at Bermuda before my lighthouse was put there; since its establishment and good maintenance the wreckers have been compelled to change their occupation. They now are engaged principally in cultivating oranges.
—Alexander Gordon, Circular relating to lighthouses, lightships, buoys, and beacons (London, 1862).