The followers of John Huss, a professor of the University of Prague, who had imbibed the Wycliffite doctrines. Though excommunicated by Pope Alexander V in 1412, he continued to disseminate these doctrines, and was consequently summoned to the Council of Constance in 1414, where, though under the Emperor’s safe-conduct, he was thrown into prison, and subsequently burnt at the stake. His principal disciple, Jerome of Prague, suffered the same fate in 1416, but his followers, under John Zisca, rose in revolt against the Church, to the number of 40,000. They destroyed some five hundred convents, and defeated the Emperor Sigismund, but were broken up into sections in 1424, following upon Zisca’s death. They still, however, remained in insurrection until 1436, when the revolt was ended by the treaty of Iglau. Hyde Park Riots. A riot which broke out in 1866, after the defeat of the Russell Ministry over the Reform Bill of that year. A meeting had been summoned by the Reform League, to meet in Hyde Park, but the Government prohibited the meeting, and closed the park gates, whereupon the mob pulled down the railings. Little other damage, however, was done, and the riot was easily quelled. I I. D. B. _See_ Illicit Diamond Buying. Iconoclasts. This name was first given to the followers of Leo III, Emperor of the East, who in 726 interdicted the worship of images. The opposition of a considerable section of his subjects did not deter him from carrying his principles into effect, and what is known as the Iconoclast War was the result. The same title is applied to the more militant Huguenots in France in 1560 and 1561, who, wherever they obtained the upper hand, ruthlessly destroyed the statues which adorned the churches and monasteries, and also to a section of the Puritans during the English Civil War. Iglau, Treaty of. A treaty between the Hussites and the Emperor Sigismund, signed in 1436, putting an end to the Hussite War. It was based upon the Compactata of Prague, and secured to the Hussites the free exercise of their religion on the lines of that document. Ilbert Bill. A bill introduced in the Legislative Council of India by Mr. Ilbert in 1883 “to amend the criminal jurisdiction over British subjects.” It largely extended the jurisdiction of native magistrates in the trial of Europeans, and was most bitterly criticised by the Anglo-Indian community, especially by planters and others living in remote districts. Illicit Diamond Buying. An illegal trade in diamonds carried on by certain speculators in Kimberley, who purchased from the employés of the Diamond companies rough diamonds which they had secreted in the process of washing. It was largely checked by the Diamond Trade Act of 1882. This illicit trade is generally known as I.D.B. Illuminati.