In the meantime the police, with the utmost difficulty, rescued the first bomb-thrower from the maddened mob. The man, whose name proved to be Risakoff, coolly thanked the officers for preserving him, and then tried to swallow some poison which he had ready. In this he was foiled, and he was taken to prison. [Illustration: THE CZAR’S CARRIAGE AFTER THE EXPLOSION. From a Photograph.] The infernal machine used by Elnikoff was about 7½ inches in height, and its construction is exemplified in the annexed diagram. Metal tubes (_b b_) filled with chlorate of potash, and enclosing glass tubes (_c c_) filled with sulphuric acid (commonly called oil of vitriol), intersect the cylinder. Around the glass tubes are rings of iron (_d d_) closely attached as weights. The construction is such that, no matter how the bomb falls, one of the glass tubes is sure to break. The chlorate of potash in that case, combining with the sulphuric acid, ignites at once, and the flames communicate over the fuse (_f f_) with the piston (_e_), filled with fulminate of silver. The concussion thus caused explodes the dynamite or “black jelly” (_a_) with which the cylinder is closely packed. [Illustration] I said above that Jelaboff, the real leader of the conspiracy, had been arrested on the 10th. He was merely a suspect, and it was some time before the police realized what an important arrest had been made. Only two hours before the murder of the Emperor, Jelaboff’s house was searched, and there was found a great quantity of black dynamite, India rubber tubes, fuses and other articles. Jelaboff had been living here with a woman who was called Lidia Voinoff. This Lidia Voinoff was arrested on the Newsky Prospect, on March 22nd, and almost immediately identified as Sophia Perowskaja, the young woman who had given the handkerchief signal to the bomb-throwers, and who was wanted besides for the Moscow railway mine case. On the prisoner were found papers which led to the search of a house on Telejewskaia Street, where a man named Sablin committed suicide immediately on the appearance of the police, and a woman named Hessy Helfmann was arrested. A regular Nihilist arsenal of black jelly, fuses, maps of different districts of St. Petersburg, with the Czar’s usual routes marked upon them, copies of papers from the secret press, etc., were found. While the police were still engaged in the search of the premises Timothy Mikhaeloff came in by accident. He was taken, and on him was found a copy of the new Czar’s proclamation, and penciled on the back were the names of three shops with three different hours in the afternoon. The officers descended on these places and gathered in customers, shop-keepers and everybody else about the place,—a process which brought in Kibaltchik, the Nihilist chemist and bomb-maker.