For centuries it has been the custom—lately, however, to a less extent—for the crofter-fisherman to fish in the summer and to work on his farm during the rest of the year. Every voe and creek had its fleet of small boats engaged in line fishing; but owing to the depredations of trawlers on the fishing grounds and other adverse circumstances, the system gradually declined. Line industry has now shrunk to very small dimensions, and herring fishing has taken its place. At a few creeks round the coast, small boats still engage in line fishing, while at Lerwick and Scalloway there is a considerable fleet of boats engaged in haddock and long-line fishing. Haddocks and halibut are sent in ice to Aberdeen, while other kinds of fish are salted and dried for export. Lerwick and Scalloway have also kippering kilns. [Illustration: Dutch Fishing Fleet in Lerwick Harbour] From its position and other natural advantages, Lerwick is an ideal fishing centre, and is now one of the chief fishery ports in Scotland. The Harbour Trustees have provided pier accommodation, erected a fish market, and in other ways met the demands of this industry. [Illustration: Steam Drifters and Fish Market, Lerwick] Round the harbour and along the shores of Bressay Sound a large number of curing yards are erected, each with its wooden jetty, at which the herrings are discharged. There they are taken in hand by a staff of men and women, who clean and salt them in barrels. They used to be shipped to the Continent—chiefly to Russia and Germany—through Hamburg and the Baltic ports of Petrograd, Libau, Riga, Stettin, Konigsberg, and Dantzig. The fish-offal is collected from the various fishing stations and taken to the factories in Bressay, where up-to-date machinery converts the raw material into articles of commerce, as fish meal for feeding cattle and pigs; oil for tanning; stearin for soap-making; and manure. Other fishing ports are Baltasound, Sandwick, Whalsay and Scalloway. There and at other centres herring fishing is carried on by sailing boats as well as steam drifters. In other districts deserted curing yards may be seen—relics of the formerly prosperous fishing stations.