"I have an idea," hurriedly shouted George as he broke for the door. "Wait for me," he said, as he turned around and cast a glance back into the room. "I will be back at once," were the last words they heard.
John laughed at George's precipitous flight. "I suppose he has just thought of something that bears on the case. In the meantime, and while George is[p. 207] away, you, Harry, might get a hammer and a cold chisel. We may have to cut the top off."
Harry rushed out and taking John's machine was quickly at the shop, where he secured a hammer and several cold chisels capable of cutting the copper.
When he returned George was there, and was unfolding the paper scrap which they found below the skull. "Probably, this will explain the triangle," said George, as he pointed to the V-shaped mark. "The upper part of it is very likely worn away, so that we cannot see it."
John smiled at the suggestion as he took the paper and carefully examined it. "Your view may be correct," he responded.
"That looks like a suggestion of a line," said Harry, pointing to a faint scratch near the upper margin.
The Professor's messenger came in hurriedly, and announced that the paralytic had sent for him. "I will return by the time the box is opened," said the Professor, as he hurriedly went out of the door.
"Now for the box," said Harry. The slitting chisel was applied, and he dextrously cut along the top, under the directions of John.
"Direct the chisel downwardly, to see if there is any seam to be found along the side," directed John.
"Yes; here is the place where the top was put on," shouted Harry.