Again came a trio of events. On the 24th January, 1885, an explosion occurred at the Tower of London, doing serious damage--scattering the stands of arms and playing great havoc with other implements of warfare. Great was the wreckage in the old Banqueting Hall (Fig. 24). There is every reason for the belief that the man who introduced the explosive did so in an apron fitted with pockets and worn under his greatcoat. On the same night a charge of Atlas Powder, similar to that used at the Tower, created no small havoc in Westminster Hall; while the third explosion was the well-remembered event at the House of Commons. Fortunately, the House was not sitting at the time. The Strangers' and Peers' Galleries were severely injured, and to give an idea of the wreckage, the Estimates of the following year provided a sum of £6,125 for repair of damage done to the House of Commons, and £2,500 for Westminster Hall. Two men were convicted and sentenced to penal servitude for life. [Illustration: FIG. 24.--EXPLOSION AT TOWER OF LONDON--THE BANQUETING HALL.] We give a reproduction of the Salisbury infernal machine discovered in this year--a machine of exceptionally rough make (Fig. 25). A series of minor events had taken place in Wiltshire and Hampshire, which caused the police some trouble for a couple of years. They were not believed to be of any political significance, but done simply out of pure mischief. Still, this sort of fun does not pay, as the two ringleaders found when they were sentenced at the Salisbury Assizes to twelve and two months' hard labour respectively. The year 1886 was fairly clear; but 1887 brought about the discovery of a conspiracy between Callan and Harkins to commit an outrage by means of dynamite. The police found at 24, Brixton Road, some 28lb. of explosive in the dust-bin and garden, which had been left as a legacy to Callan. Callan's empty portmanteau--also left him by the same person who bequeathed him the dynamite, a man named Cohen--condemned him, for on a microscopical examination by Dr. Dupré and the Government Inspectors, the tell-tale kieselguhr was found. [Illustration: FIG. 25.--THE SALISBURY INFERNAL MACHINE.] There was little of serious moment in 1888. The most important event of this kind in 1889 was on November 18th, when an effort was made to blow up the police and bailiffs engaged in carrying out evictions on Lord Clanricarde's estate in Co. Galway. The charge was intended to be exploded under the ground, and 25lb. of powder was to be used. The mine was to be actuated by opening a door. As the officials entered--the door having a string connecting it with the machine in use--the mine would be exploded. Happily, it failed to go off. The infernal machine used on this occasion was of a type to be found amongst the accompanying illustrations--showing a knife and string, the knife cutting the cord and releasing the trigger of a small pistol, which was designed to fire the necessary detonator.