A sudden cry of alarm from the whole party caused him to desist and look up. He echoed the cry and sprang back swiftly, for the huge mass of ice having been just on the balance, one slash at its base had destroyed the equilibrium, and it was leaning slowly over with a deep grinding sound. A moment later the motion was swift, and it fell with a terrible crash, bursting into a thousand fragments, scattering lumps and glittering morsels far and wide, and causing the whole ice-field to tremble. The concussion overturned several other masses, which had been in the same nicely-balanced condition, some near at hand, others out of sight, though within earshot, and, for a moment, the travellers felt as if the surrounding pack were disrupting everywhere and falling into utter ruin, but in a few seconds the sounds ceased, and again all was quiet.

Fortunately, the obelisk which had been overturned fell towards the north—away from the party; but although it thus narrowly missed crushing them all in one icy tomb, it blocked up their path so completely that the remainder of that day had to be spent in cutting a passage through it.

Need we say that, after this, they were careful how they used their axes and ice-chisels?

Soon after the occurrence of this incident, the labyrinths among the ice became more broken, tortuous, and bewildering. At last they ceased altogether, and the travellers were compelled to take an almost straight course right over everything, for blocks, masses, and drifts on a gigantic scale were heaved up in such dire confusion, that nothing having the faintest resemblance to a track or passage could be found.

“It’s hard work, this,” remarked the Captain to Leo one evening, seating himself on a mass of ice which he had just chopped from an obstruction, and wiping the perspiration from his brow.

“Hard, indeed,” said Leo, sitting down beside him, “I fear it begins to tell upon poor Benjy. You should really order him to rest more than he does, uncle.”

A grim smile of satisfaction played for a minute on the Captain’s rugged face, as he glanced at his son, who, a short distance ahead, was hacking at the ice with a pick-axe, in company with Alf and Butterface and the Eskimo men.

“It’ll do him good, lad,” replied the Captain. “Hard work is just what my Benjy needs. He’s not very stout, to be sure, but there is nothing wrong with his constitution, and he’s got plenty of spirit.”

This was indeed true. Benjy had too much spirit for his somewhat slender frame, but his father, being a herculean man, did not quite perceive that what was good for himself might be too much for his son. Captain Vane was, however, the reverse of a harsh man. He pondered what Leo had said, and soon afterwards went up to his son.

“Benjy, my lad.”