"Hatteras," said the Doctor, "it is enough! we cannot go further!"

"Stop, then," he replied, in a strangely altered voice; "I am going higher."

"No, it is useless; you are at the Pole already."

"No, no! higher, higher!"

"My friend, do you know who is speaking to you? It is I, Doctor Clawbonny."

"Higher, higher!" repeated the madman.

"Very well, we shall not allow it--that is all."

He had hardly uttered the words before Hatteras, by a superhuman effort, sprang over the boiling lava, and was beyond the reach of his companions.

A cry of horror burst from every lip, for they thought the poor captain must have perished in that fiery gulf; but there he was safe on the other side, accompanied by his faithful Duk, who would not leave him.

He speedily disappeared behind a curtain of smoke, and they heard his voice growing fainter in the distance, shouting--

"To the north! to the north! to the top of Mount Hatteras!

Remember Mount Hatteras!"

All pursuit of him was out of the question; it was impossible to leap across the fiery torrent, and equally impossible to get round it. Altamont, indeed, was mad enough to make an attempt, and would certainly have lost his life if the others had not held him back by main force.

"Hatteras! Hatteras!" shouted the Doctor, but no response was heard save the faint bark of Duk.

At intervals, however, a glimpse of him could be caught through the clouds of smoke and showers of ashes. Sometimes his head, sometimes his arm appeared; then he was out of sight again, and a few minutes later was seen higher up clinging to the rocks. His size constantly decreased with the fantastic rapidity of objects rising upwards in the air. In half-an-hour he was only half his size.

The air was full of the deep rumbling noise of the volcano, and the mountain shook and trembled. From time to time a loud fail was heard behind, and the travellers would see some enormous rock rebounding from the heights to engulph itself in the polar basin below.

[Ill.u.s.tration: Hatteras did not even turn once to look back, but marched straight on, carrying his country's flag attached to his staff.--P.249]

Hatteras did not even turn once to look back, but marched straight on, carrying his country's flag attached to his staff. His terrified friends watched every movement, and saw him gradually decrease to microscopic dimensions, while Duk looked no larger than a big rat.

Then came a moment of intense anxiety, for the wind beat down on them an immense sheet of flame, and they could see nothing but the red glare. A cry of agony escaped the Doctor; but an instant afterwards Hatteras reappeared, waving his flag.

For a whole hour this fearful spectacle went on--an hour of battle with unsteady loose rocks and quagmires of ashes, where the foolhardy climber sank up to his waist. Sometimes they saw him hoist himself up by leaning knees and loins against the rocks in narrow, intricate winding paths, and sometimes he would be hanging on by both hands to some sharp crag, swinging to and fro like a withered tuft.

[Ill.u.s.tration: ]

At last he reached the summit of the mountain, the mouth of the crater. Here the Doctor hoped the infatuated man would stop, at any rate, and would, perhaps, recover his senses, and expose himself to no more danger than the descent involved.

Once more he shouted--

"Hatteras! Hatteras!"

There was such a pathos of entreaty in his tone that Altamont felt moved to his inmost soul.

"I'll save him yet!" he exclaimed; and before Clawbonny could hinder him, he had cleared with a bound the torrent of fire, and was out of sight among the rocks.

Meantime, Hatteras had mounted a rock which overhung the crater, and stood waving his flag amidst showers of stones which rained down on him. Duk was by his side; but the poor beast was growing dizzy in such close proximity to the abyss.

Hatteras balanced his staff in one hand, and with the other sought to find the precise mathematical point where all the meridians of the globe meet, the point on which it was his sublime purpose to plant his foot.

All at once the rock gave way, and he disappeared. A cry of horror broke from his companions, and rang to the top of the mountain.

Clawbonny thought his friend had perished, and lay buried for ever in the depths of the volcano. A second--only a second, though it seemed an age--elapsed, and there was Altamont and the dog holding the ill-fated Hatteras! Man and dog had caught him at the very moment when he disappeared in the abyss.

Hatteras was saved! Saved in spite of himself; and half-an-hour later be lay unconscious in the arms of his despairing companions.

When he came to himself, the Doctor looked at him in speechless anguish, for there was no glance of recognition in his eye. It was the eye of a blind man, who gazes without seeing.

"Good heavens!" exclaimed Johnson; "he is blind!"

"No," replied Clawbonny, "no! My poor friends, we have only saved the body of Hatteras; his soul is left behind on the top of the volcano. His reason is gone!"

"Insane!" exclaimed Johnson and Altamont, in consternation.

"Insane!" replied the Doctor, and the big tears ran down his cheeks.

CHAPTER XXV.

RETURN SOUTH.

Three hours after this sad denouement of the adventures of Captain Hatteras, the whole party were back once more in the grotto.

Clawbonny was asked his opinion as to what was best to be done.

"Well, friends," he said, "we cannot stay longer in this island; the sea is open, and we have enough provisions. We ought to start at once, and get back without the least delay to Fort Providence, where we must winter."

"That is my opinion, too," said Altamont. "The wind is favourable, so to-morrow we will get to sea."

The day pa.s.sed in profound dejection. The insanity of the captain was a bad omen and when they began to talk over the return voyage, their hearts failed them for fear. They missed the intrepid spirit of their leader.

However, like brave men, they prepared to battle anew with the elements and with themselves, if ever they felt inclined to give way.

[Ill.u.s.tration: ]

Next morning they made all ready to sail, and brought the tent and all its belongings on board.

But before leaving these rocks, never to return, the Doctor carrying out the intentions of Hatteras, had a cairn erected on the very spot where the poor fellow had jumped ash.o.r.e. It was made of great blocks placed one on the top of the other, so as to be a landmark perfectly visible while the eruptions of the volcano left it undisturbed. On one of the side stones, Bell chiselled the simple inscription--

JOHN HATTERAS.

The duplicate of the doc.u.ment attesting the discovery of the North Pole was enclosed in a tinned iron cylinder, and deposited in the cairn, to remain as a silent witness among those desert rocks.