"Well, rather," interrupted the Idiot. "My great-grandfather, who died in 1799, had never even heard of Andrew Jackson, and if you had asked him what he thought of Darwin, he'd have thought you were guying him." "Respect for age, sir," retorted Mr. Pedagog, "restrains me from characterizing your great-grandfather, if, as you intimate, he knew less than you do. However, apart from the comparative lack of knowledge in the Idiot's family, Mr. Whitechoker, you must remember that with the advance of the centuries we have ourselves developed a certain amount of brains--enough, at least, to understand that there is a limit even to the possibilities of electricity. Now, when you say that just because an Atlantic cable would have been regarded as an object of derision in the eighteenth century, we should not deride one who suggests the possibility of a marine trolley-road between London and New York in the twentieth century, it appears to me that you are talking--er--talking--I don't like to say nonsense to one of your cloth, but--" "Through his hat is the idiom you are trying to recall, I think, Mr. Pedagog," said the Idiot. "Mr. Whitechoker is talking through his hat is what you mean to say?" "I beg your pardon, Mr. Idiot," said the School-master; "but when I find that I need your assistance in framing my conversation, I shall--er--I shall give up talking. I mean to say that I do not think Mr. Whitechoker can justify his conclusions, and talks without having given the subject concerning which he has spoken due reflection. The cable runs along the solid foundation of the bed of the sea. It is a simple matter, comparatively, but a trolley-wire stretched across the ocean by the simplest rules of gravitation could not be made to stay up." "No doubt you are correct," said Mr. Whitechoker, meekly. "I did not mean that I expected ever to see a trolley-road across the sea, but I did mean to say that man has made such wonderful advances in the past hundred years that we cannot really state the limit of his possibilities. It is manifest that no one to-day can devise a plan by means of which such a wire could be carried, but--" "I fear you gentlemen would starve as inventors," said the Idiot. "What's the matter with balloons?" "Balloons for what?" retorted Mr. Pedagog. "For holding up the trolley-wires," replied the Idiot. "It is perfectly feasible. Fasten the ends of your wire in London and New York, and from coast to coast station two lines of sufficient strength to keep the wire raised as far above the level of the sea as you require. That's simple enough." "And what, pray, in this frenzy of the elements, this raging storm of which you have spoken," said Mr. Pedagog, impatiently--"what would then keep your balloons from blowing away?" "The trolley-wire, of course," said the Idiot. Mr. Pedagog lapsed into a hopelessly wrathful silence for a moment, and then he said: