In the early and middle ages the sea fisheries were indeed much more important relatively than they are now. There was a greater demand for fish, and fishermen from various countries--from France, Flanders, Spain, and England--made long and distant voyages, extending to Iceland and even beyond the North Cape, in quest of fish. One reason for the great demand was the numerous fast-days enjoined by the Church; for although fish were eschewed by the ascetic monks of early times as dangerous to purity of soul, the fashion changed, and they were later consumed plentifully on the days of fast both by clergy and laity.[96] The fasts were strictly observed throughout Catholic Europe, and a large variety of sea and fresh-water fishes, as well as seals and cetaceans, were consumed on such occasions. Some of the large monastic establishments had their own staff of fishermen, and their fish-houses at seaports for the salting and curing of herring. Another reason for the extensive consumption of fish was the want of winter-roots and the scantiness of fodder in winter, so that it was impracticable to keep cattle and sheep for slaughtering throughout the winter. It was customary to kill them and salt the flesh in autumn; and thus fish, fresh, dried, smoked, or salted, formed a valued article of food in place of salted beef and mutton. Fish were also used to an extraordinary extent in victualling the army and navy, and in provisioning castles, the expense on this item of the commissariat generally equalling or exceeding that for beef, mutton, or pork.[97] The distribution even of fresh fish was also much better than might have been expected. Barges and boats carried them up the rivers, and pack-horses and waggons transported them throughout the country, so that even in inland counties the harvesters in the fields were supplied with herrings for their dinner.[98] In mediæval times, moreover, fishermen and fishing vessels constituted a considerable part of the naval force available for the defence of the kingdom, for offensive operations and the transport of soldiers. The fishermen of the Cinque Ports, who had the government of the great herring fair at Yarmouth, had also to provide vessels for the king’s service under their charters. Later, when a permanent navy existed, the fisheries were looked upon as a very important “nursery” of seamen to man the fleets.