Several days went by after the adventure recorded in the last chapter without anything further being seen of the strangers. The friends kept a watch upon their curious-looking abode from the shore, and sometimes from the water; but the voyagers gave no sign. At times a muffled hammering and clanging could be heard from inside, 'which,' as Tom Clinch expressed it, 'confirmed Mr Armeath's 'pinion as there's summat wrong with the works.'

To the impatient youngsters the time seemed to drag by slowly, and even Mr Armeath himself did not conceal the curiosity he felt.

'I confess,' said he, 'that I am waiting with the most intense interest to see what developments are in store for us. Before these people could have constructed such a machine, they must have made many wonderful discoveries in the sciences. What marvels they will be able to show us!'

But Gerald's feelings in the matter went beyond mere scientific curiosity. He had been most strangely attracted by the face and general appearance of the man whose life he had saved. The recollection of his countenance, the expression of lofty nobility, and wondrous, indefinable graciousness which he had read there, had fascinated him, and now seemed to haunt him. He looked forward with eager expectation to meeting this wonderful being again, and longed for an opportunity of becoming friendly with him.

Under the influence of these feelings, Gerald became more restless from day to day. He could not sleep at night, and took to staying out upon the beach instead. There he passed the time marching to and fro opposite to the great dark mass which, sphinx-like, remained silent and inscrutable, and refused to divulge any more of its mysterious secrets.

One night, as he thus paced up and down in the darkness, he suddenly saw one part of the structure light up as though screens inside had been removed. He heard voices, and dimly saw a gangway open, after which something which looked like a boat was pushed out quietly and smoothly on to the water. Then shadowy figures stepped into her, and began to row or paddle towards the shore.

'At last! At last!' thought Gerald, highly pleased. 'They are coming ashore at last! I will go forward to greet them!'

Had he not been so taken up with the expectation of meeting again the one who had so attracted his interest, he would probably have felt some distrust at the fact that these strangers should be coming ashore thus stealthily in the darkness instead of in the daylight. No suspicion, however, entered his mind, and he ran forward to welcome them just as the boat grounded on the sand. From her stepped out three figures, who came towards him.

What happened next he was never able to say with certainty. He was conscious of a quick movement on the part of one of the three, and he felt a slight pricking sensation in one of his hands, somewhat as though he had been touched by a very sharp needle.

Then a giddiness seized him, his legs seemed to give way under him, and he sank, rather than fell, to the ground, and rolled over. When he tried to rise he found that he had no sort of control over his muscles; they refused to act, and he was unable to move so much as a finger. Even his voice refused to obey his will, for he vainly tried to cry out; no sound issued from his lips.