He upturned a palm. “Of course. Zero! I had been a witless ass. The use of the dot as a symbol for ‘times’ is a strictly modern device. Since the rest of the message, the figures three and two, were in Hindu number script, surely the dot was too — provided that the Hindus had made any use of the dot. And what made my blunder so unforgivable was that the Hindus had indeed used a dot; they had used it, as is explained in Hogben’s book, for the most brilliant and imaginative invention in the whole history of the language of numbers. For when you have once decided how to write three and how to write two, how are you going to distinguish among thirty-two and three hundred and two and three thousand and two and thirty thousand and two? That was the crucial problem in number language, and the Greeks and Romans, for all their intellectual eminence, never succeeded in solving it. Some Hindu genius did, twenty centuries ago. He saw that the secret was position. Today we use our zero exactly as he did, to show position, but instead of a zero he used a dot. That’s what the dot was in the early Hindu number language; it was used like our zero. So Heller’s message was not three times two, or six; it was three zero two, or three hundred and two.”
Susan Maturo started, jerking her head up, and made a noise. Wolfe rested his eyes on her. “Yes, Miss Maturo. Three hundred and two people died in the explosion and fire at the Montrose Hospital a month ago. You mentioned that figure when you were talking with me, but even if you hadn’t, it is so imbedded in the consciousness of everyone who reads newspapers or listens to radio, it wouldn’t have escaped me. The moment I realized that Heller’s message was the figure three hundred and two, I would certainly have connected it with that disaster, whether you had mentioned it or not.”
“But it’s—” She was staring. “You mean it is connected?”
“I’m proceeding on that obvious assumption. I am assuming that through the information one of you six people furnished Leo Heller as factors for a formula, he formed a suspicion that one of you had commited a serious crime, and that his message, the figure three hundred and two, indicates that the crime was planting in the Montrose Hospital that bomb that caused the deaths of three hundred and two people — or at least involvement in that crime.”
It seemed as if I could see or feel muscles tightening all over the room. Most of those dicks, maybe all of them, had of course been working on the Montrose thing. Cramer pulled his feet back and his hands were fists. Purley Stebbins took his gun from his holster and rested it on his knee and leaned forward, the better to have his eyes on all six of them.
“So,” Wolfe continued, “Heller’s message identified not the person who was about to kill him, not the criminal, but the crime. That was superbly ingenious, and, considering the situation he was in, he deserves our deepest admiration. He has mine, and I retract any derogation of him. It would seem natural to concentrate on Miss Maturo, since she was certainly connected with that disaster, but first let’s clarify the matter. I’m going to ask the rest of you if you have at any time visited the Montrose Hospital, or been connected with it in any way, or had dealings with any of its personnel. Take the question just as I have stated it.” His eyes went to the end of the row, at the left. “Mrs. Tillotson? Answer, please. Have you?”
“No.” It was barely audible.
“Louder, please.”
“No!”
His eyes moved. “Mr. Ennis?”