After the dynamite bomb exploded, carrying death into the ranks of men with whom I had been for years closely associated—after an impudent attack had been made upon our law and upon our system, which I was sworn to defend—it came to me as a duty to the State, a duty to my dead and wounded comrades, to bring the guilty men to justice; to expose the conspiracy to the world, and thus to assist in vindicating the law. How the duty was performed, this story tells. It is a plain narrative whose interest lies in the momentous character of the facts which it relates. Much of it is now for the first time given to the public. I have drawn upon the records of the case, made in court, but more especially upon the reports made to me, during the progress of the investigation, by the many detectives who were working under my direction. I can say for my book no more than this: that from the first page to the last there is no material statement which is not to my knowledge true. The reader, then, may at least depend upon the accuracy of the information presented here, even if I cannot make any other claim. It would be unfair and ungrateful if I did not seize this opportunity to put on lasting record my obligations to Judge Julius S. Grinnell, who was State’s Attorney during the investigation. His support, steady and full of tact, enabled me to go through with the work, in spite of obstacles deliberately put in my way. My position was a delicate and difficult one: had it not been for him, and for others, success would have been almost impossible. Nor can I forego this occasion to bear testimony to the magnificent police work done in the case by Inspector Bonfield and his brother, James Bonfield, and by the officers who acted directly with me. These were Lieut. Charles A. Larsen and Officers Herman Schuettler, Michael Whalen, Jacob Loewenstein, Michael Hoffman, Charles Rehm, John Stift and B. P. Baer. Mr. Edmund Furthmann, at that time Assistant State’s Attorney, as I have elsewhere recorded, worked upon the inquiry into the conspiracy with an acumen, a perseverance and an industry which were beyond all praise. I knew, when he was first associated with me in the case, that the outcome must be a victory for outraged law, and the result vindicated the prediction. To Mr. Thomas O. Thompson and to Mr. John T. McEnnis much of the literary form of this volume is to be credited, and to them also I am under lasting obligations. MICHAEL J. SCHAACK. _Chicago, February, 1889._ TABLE OF CONTENTS. CHAPTER I.