"But I have Hutoton, that terrible place where the criminals live,"

retorted George, with a laugh.

"And that reminds me; what about the copper box?"

The boys wended their way to the Professor, and were delighted to find John there. "Before we go we want to have the copper box opened,"

remarked Harry.

"I have just brought it around, in the machine," said John, as he noticed the boys peering at it through the window.

"What is that in the package lying on the box?"

"Can't you guess?"

"No."

"Have you forgotten the skull with the inscription on it?"

"Do you mean the skull we found on the headland at the eastern end of the island?"

"Yes."

"Why, what is that for? Do you think it has anything to do with the box?"

"Probably not; but I was curious to examine it further in view of the similarity of the chart and the inscription."

The boys could not possibly understand what was meant by such a reference. While they were talking the Professor entered the room, and remarked, "I have just come from the old fellow, and his reason is returning under the treatment, and he is also better physically."

"Do you mean the paralytic?"

"Yes; but there is one thing which is singular, and that is the constant muttering of the word _triangle_. This morning I could plainly distinguish several other words, such as 'of' and 'three,' and 'very well,' and parts of other words, showing that in time, if his improvement continues, we may get more information."

"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 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 sc.r.a.p 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.

"Why, it has been soldered," said George. "Well, that means business."

It was evident that the soldering was effectively done, because the solder had run entirely through the seam, and it was really sweated on.

The copper used was about an eighth of an inch thick, and the soft and ductile character showed that it was pure metal.

"Be very careful as you get around so as not to disturb the contents, by the falling of the lid," said John.

It still adhered at various places, and this was carefully cut away by one of the thin chisels, and the lid finally raised at one corner, sufficiently to disclose a portion of the contents, which appeared to be round and white, and resting near the center of the s.p.a.ce.

All caught a glimpse of it, and involuntarily started back in surprise.

It was a skull, the counterpart of the one lying on the table which contained the inscription.

"Open it wide," said John in a peculiar voice, and as he did so the Professor rushed in and announced that the paralytic had recovered speech, and he had ordered him to be brought in.

While the Professor was saying this, John was slowly raising the lid, and by a quick motion tore it away, and the Professor was actually taken aback at the sight before him. He gazed for a moment, and then muttered: "And the same inscription too!"

All looked toward it in amazement, and while puzzling over its meaning, the paralytic was helped in by two attendants. He came forward, saw the two skulls, and before either could prevent it he collapsed and fell to the floor, apparently lifeless.

He was gathered up and placed on a couch, and restoratives applied by the Professor. He lay thus in a stupor for more than a half hour, but soon returning consciousness began to manifest itself, and when he opened his eyes, and glanced about, his lips began to move. Here the Professor held up a warning hand, which he seemed to heed, for he immediately closed his eyes, and was soon asleep, as his breathing became regular, and the pulse began to act normally.

"There must be no more agitation now," said the Professor. "We can take the box to the adjoining room." This was done, and John carefully lifted the skull from its resting place, bringing with it a ma.s.s of other material, which looked like brown or discolored parchment.

The skulls were placed side by side. They were singularly alike, the inscription of the one found on the headland, was on the left side, and the like figures of the one taken from the box were on the right side.

"That is a singular thing," said Harry.

"So it is," answered John, "but it doubtless has a meaning," he continued.

Beneath the box, and attached to the wrappings, was a ma.s.s of material which John eagerly seized, and began to unwrap, while the Professor interestedly looked on. There was not the first sign of any treasure in the box, and when the several folds of the parchment were unrolled, the boys could see the hieroglyphics that the Professor and John so eagerly scanned.

"Yes, yes, I knew you would come back," said the man in the adjoining room, and John dropped the parchment and followed the Professor into the room, where they saw the old man sitting on the couch and staring about with an inquiring countenance.

"What is your name?" said the Professor.

He did not answer at first but looked at John and the Professor in amazement.

"Why do you ask?" he then muttered, without changing his countenance. "I have told you over and over," he continued.

"Do you know where you are?" asked John.

"Certainly. You may ask Walter about that."

"Walter? Do you know Walter?" asked George, almost involuntarily.

He smiled and nodded his head. "He is here. I saw him yesterday. I wish he would explain." Then he dropped back on the couch and remained motionless.

The effort to arouse him was useless, and the Professor advised patience. There was something so peculiar about the whole situation that it fascinated the boys. What did this man know about Walter? Possibly, through him the great mystery, that commenced with the note in the seat of their boat, would be explained.