"I have heard of you, of course," Charlock said civilly enough. "And, if such is your opinion, it is entitled to every respect. If I can do anything to help you I will. But I am certain that you are mistaken."
"We shall see," Tanza said drily. "In the first place, will you be good enough to show us the famous sundial where the accident took place, and perhaps you can tell me whether the poor woman's dress was singed? Was it round the skirt, for instance?"
"Personally, I could see no trace of it," Charlock said. "There was a certain fraying of the cloth round one of the wrists, and a swelling of the hand, as if the fingers had been recently charred. But, then, my wife tells me that Hortense inadvertently put her right hand on a pair of almost red-hot curling tongs a day or two ago, which gives the incident a very prosaic complexion. I think you can dismiss the singeing idea altogether."
For the moment the doctor looked disconcerted. But he had no intention of discarding his theory. He dropped behind, discussing the matter with Charlock, while Grey went forward to the part of the garden where the sundial was situated. He stood there admiring the beautiful carving of the marble and thinking how appropriate were the surroundings. The fountain was playing again. The sundial was like a gleaming statue in the sun. The Latin inscription on the top glistened in brass letters. There appeared to be nothing to connect the sundial with the cruel and cold-blooded murder. And, though Tanza talked scientifically about his theories, he did not appear to be making much progress.
"You are wrong," Charlock said. "I am sure the whole thing was no more than an unfortunate accident. I don't care what the doctor says. However, I sha'n't be here after to-morrow, but you are at liberty to come whenever you please and make what investigations you like. And now, if you will excuse me, I will get back to the house. You will pardon me if I don't ask you to come in."
Charlock turned away none too graciously, and the Italian doctor shrugged his shoulders.
"It is as well we are alone," he said. "I shall yet convince our friend that I am right. All the same, I am bound to confess that we look like having our trouble for our pains. Now, I suppose you don't see anything suspicious, anything which is hidden from unscientific eyes?"
"As a matter of fact, I can," Grey said quietly. "Only I waited till our friend was gone. Look here!"
He stooped and picked up a small object, which he slipped upon his thumb. Tanza lifted his brows interrogatively.
"Oh, it's a clue," Grey smiled. "What is it? Why, it is a finger torn from an india-rubber glove!"