This was occupied by an aged Swedish couple, Jonas Carlson and his wife and their son John, a strapping, well-built fellow of some twenty-five years. His parents owned the property, and about their only means of livelihood was the rent derived from the larger cottage, when they were fortunate enough to secure a tenant. Good luck, however, had failed to attend them. Early in the year, the man, who, with his family, had occupied it for some time, was convicted of embezzlement and sent to the penitentiary, and his wife and children, lacking the wherewithal to pay the rent, were forced to vacate. At the best, it was not a particularly desirable locality, for, barring O'Sullivan's house, the two buildings stood alone in an area as large as a city square, while the prairie, dotted here and there with one-story cottages, stretched far away in every direction. [Illustration: THE ASSASSIN'S DEN, WITH THE CARLSON COTTAGE IN THE REAR.] This was the lonely spot, and this the vacant house that the assassins chose for their den, and within these walls Dr. Cronin came to his death. On the day following the finding of the body State's Attorney Longenecker, Captain Schuettler of the City Police, and Captain Wing of the Lake View Police, met in consultation. It was decided to send for O'Sullivan, the ice-man. While no direct suspicions were at that time entertained that he was concerned in the tragedy, there was an indefinable feeling that he knew something or other that might prove of importance in relation to the affair. O'Sullivan promptly responded to the summons. Pressed by the State's Attorney to tell them anything he might know, O'Sullivan said that he believed there had been something mysterious going on in the Carlson cottage. Two suspicious looking men, he went on to say, had appeared in the neighborhood about March and rented the place, paying a month's rent. Since that time they had occupied it very little, if at all. To the landlord they had pretended that they were going to work for him (O'Sullivan), but this was not true, for he knew nothing about them, and certainly had never hired them. The matter looked suspicious, he thought, and ought to be investigated, especially as it was possible that these were the men who had used his name to Dr. Cronin. Beyond this he knew absolutely nothing. "BLOOD, BLOOD, EVERYWHERE!"