The taller and more striking-looking of the two was Sir Reginald Elphinstone, a baronet, and an immensely wealthy man, with a magnificent estate in the heart of the most picturesque part of Devonshire, a lovely wife, and a most charming, lovable little daughter, now just five years old. The baronet himself had barely passed his fortieth year, and was a superb specimen of English manhood, standing full six feet two in his stockings, with a fine athletic figure, blue eyes that ordinarily beamed with kindliness and good-humour, but which could, upon occasion, flash withering scorn or scathing anger upon an offender, and curly golden hair, with beard and moustache to match, that made him look like a viking got up in the style of a twentieth-century English gentleman. His companion, much shorter and stouter of figure, was Professor Heinrich von Schalckenberg, a German by birth, but a cosmopolitan by nature and by virtue of his own restless disposition, which would never permit him to settle down for very long in any one place, however attractive. He was a perfect marvel in the matter of learning, a most accomplished linguist, and an indefatigable delver in the lesser-known fields of science, wherein he was credited with having made discoveries of vast importance and value. If such was the case he was in no hurry to make his discoveries public property, chiefly, perhaps, because--as some of his more intimate friends suggested--they were of such a nature as rendered them capable of disastrous misuse in the hands of the evil-disposed, especially those enemies of society and the human race, the Anarchists. Be that as it may, it was undoubtedly the fact that he had discovered two hitherto unknown substances, the properties of which would render them of priceless value whenever he should see fit to make them known: the one being an unoxidisable metal of extraordinary strength and tenacity, yet of so little weight that it was the lightest known solid, to which he had given the name of _aethereum_; while the other was a new power, derivable from certain chemically prepared crystals which, treated in one way, yielded electricity in enormous volumes, while, powdered and treated with a certain acid, they evolved an expansive gas of stupendous potency, capable of being advantageously used in place of any of the known explosives, or of steam. And it was known to a few of the more intimate friends of the professor and of Sir Reginald, that the former had designed and constructed of his wonderful metal a marvellous ship, appropriately named the _Flying Fish_, capable not only of navigating the surface of the ocean, but also of diving to its extremest depth, and--more wonderful still--of soaring to hitherto unapproachable altitudes of the earth's atmosphere. And it was further known that in this extraordinary ship--constructed for and at the expense of Sir Reginald Elphinstone--the baronet, the professor, and two