“I propose to make Nature the labourer of man,” answered Warner. “When I was a child of some eight years old, I observed that water swelleth into vapour when fire is applied to it. Twelve years afterwards, at the age of twenty, I observed that while undergoing this change it exerts a mighty mechanical force. At twenty-five, constantly musing, I said, ‘Why should not that force become subject to man’s art?’ I then began the first rude model, of which this is the descendant. I noticed that the vapour so produced is elastic,—that is, that as it expands, it presses against what opposes it; it has a force applicable everywhere force is needed by man’s labour. Behold a second agency of gigantic resources! And then, still studying this, I perceived that the vapour thus produced can be reconverted into water, shrinking necessarily, while so retransformed, from the space it filled as vapour, and leaving that space a vacuum. But Nature abhors a vacuum; produce a vacuum, and the bodies that surround rush into it. Thus, the vapour again, while changing back into water, becomes also a force,—our agent. And all the while these truths were shaping themselves to my mind, I was devising and improving also the material form by which I might render them useful to man; so at last, out of these truths, arose this invention!”

“Pardie,” said Edward, with the haste natural to royalty, “what in common there can be between thy jargon of smoke and water and this huge ugliness of iron passeth all understanding. But spare us thy speeches, and on to thy puppet-show.”

Adam stared a moment at the king in the surprise that one full of his subject feels when he sees it impossible to make another understand it, sighed, shook his head, and prepared to begin.

“Observe,” he said, “that there is no juggling, no deceit. I will place in this deposit this small lump of brass—would the size of this toy would admit of larger experiment! I will then pray ye to note, as I open door after door, how the metal passes through various changes, all operated by this one agency of vapour. Heed and attend. And if the crowning work please thee, think, great king, what such an agency upon the large scale would be to thee; think how it would multiply all arts and lessen all labour; think that thou hast, in this, achieved for a whole people the true philosopher’s stone. Now note!”

He placed the rough ore in its receptacle, and suddenly it seemed seized by a vice within, and vanished. He proceeded then, while dexterously attending to the complex movements, to open door after door, to show the astonished spectators the rapid transitions the metal underwent, and suddenly, in the midst of his pride, he stopped short, for, like a lightning-flash, came across his mind the remembrance of the fatal papers. Within the next door he was to open, they lay concealed. His change of countenance did not escape Richard, and he noted the door which Adam forbore to open, as the student hurriedly, and with some presence of mind, passed to the next, in which the metal was shortly to appear.

“Open this door,” said the prince, pointing to the handle. “No! forbear! There is danger! forbear!” exclaimed the mechanician.

“Danger to thine own neck, varlet and impostor!” exclaimed the duke; and he was about himself to open the door, when suddenly a loud roar, a terrific explosion was heard. Alas! Adam Warner had not yet discovered for his engine what we now call the safety-valve. The steam contained in the miniature boiler had acquired an undue pressure; Adam’s attention had been too much engrossed to notice the signs of the growing increase, and the rest may be easily conceived. Nothing could equal the stupor and the horror of the spectators at this explosion, save only the boy-duke, who remained immovable, and still frowning. All rushed to the door, huddling one on the other, scarcely knowing what next was to befall them, but certain that the wizard was bent upon their destruction. Edward was the first to recover himself; and seeing that no lives were lost, his first impulse was that of ungovernable rage.

“Foul traitor!” he exclaimed, “was it for this that thou hast pretended to beguile us with thy damnable sorceries? Seize him! Away to the Tower Hill! and let the priest patter an ave while the doomsman knots the rope.”

Not a hand stirred; even Catesby would as lief have touched the king’s lion before meals, as that poor mechanician, standing aghast, and unheeding all, beside his mutilated engine.

“Master Nevile,” said the king, sternly, “dost thou hear us?