By the arrival of the year 1915 the current was well under way. The piers were extremely busy and the facilities for trouble were multiplying. On January 3 there was an explosion on the steamship _Orton_ in Erie Basin for which there was no apparent explanation. A month later a bomb was discovered in the cargo of the _Hennington Court_, but no one could say how it came there. Toward the end of February the steamship _Carlton_ caught fire at sea--mysteriously. Two months passed, then two bombs were found in the cargo of the _Lord Erne_. We might have had a look at them, for that was the business of the Bomb Squad, if those who had found the bombs had not dumped them overboard rather hastily. A week later a bomb was found in the hold of the _Devon City_. Again no explanation. Nor any reasonable cause why the _Cressington Court_ caught fire at sea on April 29. Our attention had been directed to each of these instances, and we had investigated, and folders waited in the files for the reports which properly developed would lead to an arrest, and the sum total of those reports was--nothing. Then our luck turned for a moment. The steamship _Kirkoswald_, out of New York, laden with supplies for France, docked at Marseilles, and in four sugar-bags in her hold were found bombs. The French authorities commandeered them, and removed and analyzed the explosive charge. The police commissioner cabled at once to Marseilles requesting the return of one of the bomb-cases, together with the bag in which it had been found, and an analysis of the contents. No answer. So he cabled again. The bomb-case then began a journey back to the United States, presented with the compliments of the Republic of France by M. Jusserand to the State Department at Washington, and forwarded in turn to Mayor Mitchel of New York. Our study disclosed that it was of a new type: a metal tube some ten inches long, divided into two compartments by a thin aluminum disc. One compartment had held potassium chlorate, a powerful explosive, and the other had contained sulphuric acid. The acid had been expected to eat through the thin disc separating the compartments, and explosion was to have followed, but for some reason it had failed. The metals were of good quality, and the workmanship was thorough.