The extensive system of monopolies which the League maintained was, as a matter of course, the cause of much jealousy and bad feeling. In Flanders, Ghent, Bruges, and Ypres defended their own privileges against other towns, and quarrelled amongst themselves. The merchants of Ypres had a monopoly which forbade all weaving for three leagues round the town, under a penalty of fifty livres and confiscation of the looms and linen woven; but the weavers in the neighbouring communes infringed this monopoly, and sold imitations of Ypres linen cloth on all hands. There was constant trouble between the people of Ypres and their neighbours at Poperinghe. Sometimes the weavers of Ypres, to enforce their exclusive privileges, marched in arms against Poperinghe, and sometimes the men of Poperinghe retaliated by attacking their powerful rivals. Houses were burnt, looms were broken up, and lives were lost in these struggles, which were so frequent that for a long time something like a chronic state of war existed between the two places. [Illustration: YPRES Arcade under the Nieuwerck.] Besides the troubles caused by the jealousy of other towns, intestine disputes arising out of the perpetual contest between labour and capital went on from year to year within the walls of Ypres. There, as in the other Flemish towns, a sharp line was drawn between the working man, by whose hands the linen was actually woven, and the merchants, members of the Guilds, by whom it was sold. In these towns, which maintained armies and made treaties of peace, and whose friendship was sought by princes and statesmen, the artisans, whose industry contributed so much to the importance of the community, resented any infringement of their legal rights. By law the magistrates of Ypres were elected annually, and because this had not been done in 1361 the people rose in revolt against the authorities. The mob invaded the Hôtel de Ville, where the magistrates were assembled. The Baillie, Jean Deprysenaere, trusting to his influence as the local representative of the Count of Flanders, left the council chamber, and tried to appease the rioters. He was set upon and killed. Then the crowd rushed into the council chamber, seized the other magistrates, and locked them up in the belfry, where they remained prisoners for some days. The leaders of the revolt met, and resolved to kill their prisoners, and this sentence was executed on the Burgomaster and two of the Sheriffs, who were beheaded in front of the Halle in the presence of their colleagues.[19] It was by such stern deeds that the fierce democracy of the Flemish communes preserved their rights.