No doubt could any longer exist but that the suspicions that had been entertained that Detective Coughlin was, to a greater or lesser degree, connected with the crime, was well founded. It was equally certain that, by the same process of reasoning, O'Sullivan was largely in the toils. Many a man and woman in foreign countries had been sent to the gallows on evidence far less circumstantial than that with which the iceman was confronted at this stage of the case. It was beyond all question, that about the middle of April, more than a month prior to the disappearance of Dr. Cronin, he had asked John A. Mahoney, a Lake View Justice of the Peace, to introduce him to the physician, giving as a reason that he wanted to make a contract with some good surgeon to take care of the men who were employed on his ice wagons, during the hot season. The Justice, either not knowing or not remembering that O'Sullivan employed but three or four men, readily consented, and the two men went to the Physician's office in the Chicago Opera House block. Here after considerable conversation, a contract was agreed upon, by which O'Sullivan undertook to pay Dr. Cronin $8.00 per month, the latter agreeing to attend the iceman's employees when injured, as well as any children that might be hurt by his wagons. In this agreement however, there was one remarkable and significant stipulation. It was to the effect that the Physician should respond to any call that might be made, by any person presenting one of O'Sullivan's cards, and, in order that there should be no mistake on this point, the ice dealer after the interview in question handed one of his cards to the Physician. The latter placed it in the frame of the mirror of his private office, and there, a silent witness, yet ready to testify in trumpet tones, it was found on the day succeeding the night that he was decoyed to his death.
It was commented upon at the time as remarkable that Dr. Cronin should not have made some inquiries when the matter of the contract was broached. So far as was known by his friends no arrangement of this kind had ever before been suggested to him in the course of his many years of practice. At this very time, moreover, he was in constant dread, or at least anticipation, of being murdered. Yet, although the financial consideration mentioned was purely nominal, he went into the matter as a speculator goes into a blind pool. Apparently it never suggested itself to him, to inquire why O'Sullivan should desire to make such a contract. He had no ice houses, his business consisting in retailing ice which he purchased at wholesale rates from various shippers. He employed but a very few men and there was no evidence that any of his wagons had created havoc among the little ones on the North Side of the city. His business was almost exclusively with private families who purchased their ice in small quantities, rarely over 100 pounds at a time. His men ran little or no risk of getting hurt, and even if they did, the iceman would in no way have been responsible. Assuming, however, that he was more than ordinary solicitous about his employees, and willing to assume the responsibility for their care in sickness, why should he have selected the Irish physician? Why should he have picked out a man whose office was nearly six miles from his barns, when fully two score of experienced surgeons were to be found all over the town of Lake View, to say nothing of those who resided at short distances along the route from the suburb to the residence of the Conklins? There were other pertinent questions. Why did O'Sullivan need an introduction to Dr. Cronin? He had met him before, in fact had participated in a meeting of a Camp of the Clan-na-Gael when the physician had assisted in the initiation of several new members. He had no favor to ask, and even offered to make the first month's payment on the contract in advance and to always pay in advance. Why then should he have induced Justice Mahoney to ride five miles in order that the justice might introduce a man already known to Dr. Cronin, who had no favor to ask and who simply desired to make a contract decidedly unfavorable to himself?