They were stalwart, well-grown, clean-limbed British youths, these two, with good-looking faces and well-knit frames, fond of hunting, shooting, fishing, and all outdoor sports. At first, therefore, it is needless to say, they had enjoyed the change to this far-off island home, and entered with zest into its free, open life. If limited as to space, there were larger islands near, amongst which they could take an occasional cruise, and where they could go ashore for hunting expeditions.
But after nearly a year, even this pleasant life had begun to grow a little monotonous. The two high-spirited youngsters were getting somewhat tired of it, and beginning to long--almost unconsciously--for other and more exciting adventures.
Of the two, however, Gerald perhaps was more troubled by these vague, restless feelings than his chum. As his friend had said, Gerald was given at times to fits of dreaming. In appearance he was fairer and a little taller than his companion, with gray eyes which often had in them an abstracted, far-away look. Jack, on the other hand, was almost swarthy of skin, with dark hair, firm lips, and keen, alert eyes, which indicated an active, determined character, and a practical, matter-of-fact temperament.
That, in effect, constituted the essential difference between these two firm friends. Gerald was fond of indulging in speculations concerning all kinds of scientific research. The mysteries of the unknown, and the as yet 'undiscovered;' the limitless possibilities lying in the worlds surrounding our globe--speculations concerning such themes as these had for him an irresistible fascination. Jack, on the other hand, kept his thoughts and interest fixed upon the practical side of everything about him. He was a skilful mechanic and a trained mathematician, and had developed clever engineering abilities; he might possibly some day become an inventor. But speculative, dreamy fancies had little attraction for him.
'Jack,' said Gerald impressively, 'I can't come in just now--I really cannot! I can't exactly say why, but to-night I seem to be unusually restless. I could not sit down indoors, nor could I rest if I went to bed. I don't know what it is; but I have a feeling'----