Then the idea of reaching the upper plateau came up again. Pending the recovery of the captain, was it not necessary to find out whether the boat had come ashore on a continent, an island, or a mere islet? As the cliff was seven or eight hundred feet high it was quite possible that some other land might be visible a few miles out at sea. So Fritz and Frank and the boatswain made up their minds to climb to the top of the cliff.

Several days passed without bringing any change in the situation. Every one realised the necessity of escaping from it somehow or other, and all were seriously afraid that it might become worse. The weather remained fine. The heat was great, but there was no thunder.

On several occasions John Block and Fritz and Frank had walked round the bay from the western bastion as far as the bluff. In vain had they looked for a gorge or less precipitous slope by which they might gain the plateau above. The wall rose sheer.

Meantime the captain approached complete recovery. His wound was healed, though it was still bandaged. The attacks of fever had become more and more rare, and had now ceased. His strength was coming back slowly, but he could now walk unsupported. He was always talking to Fritz and the boatswain of the chances of another voyage in the boat northward. On the morning of the 25th, he was able to go as far as the foot of the bluff, and agreed that it was impossible to walk round the base of it.

Fritz, who had accompanied him, with Frank and John Block, offered to dive into the sea and so get to the shore beyond. But although he was an excellent swimmer, there was such a current running at the foot of the bluff that the captain was obliged to order the young man not to put this dangerous idea into execution. Once borne away by the current, who could say if Fritz could have got back to the shore?

“No,” said Captain Gould, “it would be rash, and there is no good in running into danger. We will go in the boat to reconnoitre that part of the coast, and if we go a few cables’ length out, we shall be able to get a more extended view of it. Unfortunately I am very much afraid that it will be found to be as barren everywhere as it is here.”

“You mean that we are on some islet?” Frank remarked.

“There is reason to suppose so,” the captain replied.

“Very well,” said Fritz, “but does it follow that this islet is an isolated point? Why should it not be part of some group of islands lying to the north, east, or west?”

“What group, my dear Fritz?” the captain retorted. “If, as everything goes to show, we are in Australian or New Zealand waters here, there is no group of islands in this part of the Pacific.”