Pearl fisheries exist in Ceylon, on the Coromandel coast, and in the Persian Gulf, the last-named being the most productive. Fisheries of less importance also exist in Algiers, and in the Zooloo Islands. Two thousand years ago, the Romans found pearls in Britain, and within modern times the rivers of Scotland have afforded considerable quantities, though not of the best quality. Several rivers of Saxony, Silesia, Bavaria, and Bohemia afford pearls, and they are also found in two or three Russian provinces. There are also pearl fisheries in the western hemisphere. The coast of Columbia and the Bay of Panama have furnished considerable quantities, but they are not considered equal to the pearls of the East in shape or color. Detailed accounts of the pearl fishery of Ceylon have been given by the Count de Noé and others, who have had ample means of watching the operations of the pearl-divers during a residence in that island. It appears that the pearl oysters occur in banks at greater or less depth in the sea on the western side of the island of Ceylon, the average depth, however, being about twelve fathoms, and the distance from the shore about fifteen miles. The right to fish on these banks is sold by the government every season, and a single auction sale is generally made to one individual, who afterwards disposes of shares in the fishery to other parties. The biddings at the auction are regulated by the produce of some thousands of oysters taken from the beds at hazard. If the average quality of pearls contained in them be good, the competition is strong in proportion.