“Never knew good come of it yet,” the captain said to Dr. Livesey. “Spoil forecastle hands, make devils. That’s my belief.”

But good did come of the apple barrel, as you shall hear, for if it had not been for that, we should have had no note of warning and might all have perished by the hand of treachery.

This was how it came about.

We had run up the trades to get the wind of the island we were after—I am not allowed to be more plain—and now we were running down for it with a bright lookout day and night. It was about the last day of our outward voyage by the largest computation; some time that night, or at latest before noon of the morrow, we should sight the Treasure Island. We were heading S.S.W. and had a steady breeze abeam and a quiet sea. The HISPANIOLA rolled steadily, dipping her bowsprit now and then with a whiff of spray. All was drawing alow and aloft; everyone was in the bravest spirits because we were now so near an end of the first part of our adventure.

Now, just after sundown, when all my work was over and I was on my way to my berth, it occurred to me that I should like an apple. I ran on deck. The watch was all forward looking out for the island. The man at the helm was watching watching the luff of the sail and whistling away gently to himself, and that was the only sound excepting the swish of the sea against the bows and around the sides of the ship.

In I got bodily into the apple barrel, and found there was scarce an apple left; but sitting down there in the dark, what with the sound of the waters and the rocking movement of the ship, I had either fallen asleep or was on the point of doing so when a heavy man sat down with rather a clash close by. The barrel shook as he leaned his shoulders against it, and I was just about to jump up when the man began to speak. It was Silver’s voice, and before I had heard a dozen words, I would not have shown myself for all the world, but lay there, trembling and listening, in the extreme of fear and curiosity, for from these dozen words I understood that the lives of all the honest men aboard depended upon me alone.

“NO, not I,” said Silver. “Flint was cap’n; I was quartermaster, along of my timber leg. The same broadside I lost my leg, old Pew lost his deadlights. It was a master surgeon, him that ampytated me—out of college and all—Latin by the bucket, and what not; but he was hanged like a dog, and sun–dried like the rest, at Corso Castle. That was Roberts’ men, that was, and comed of changing names to their ships—ROYAL FORTUNE and so on. Now, what a ship was christened, so let her stay, I says. So it was with the CASSANDRA, as brought us all safe home from Malabar, after England took the viceroy of the Indies; so it was with the old WALRUS, Flint’s old ship, as I’ve seen amuck with the red blood and fit to sink with gold.”

“Ah!” cried another voice, that of the youngest hand on board, and evidently full of admiration. “He was the flower of the flock, was Flint!”

“You make the glass invisible by putting it into a liquid of nearly the same refractive index; a transparent thing becomes invisible if it is put in any medium of almost the same refractive index. And if you will consider only a second, you will see also that the powder of glass might be made to vanish in air, if its refractive index could be made the same as that of air; for then there would be no refraction or reflection as the light passed from glass to air.”

“Yes, yes,” said Kemp. “But a man’s not powdered glass!”

“No,” said Griffin. “He’s more transparent!”

“Nonsense!”

“That from a doctor! How one forgets! Have you already forgotten your physics, in ten years? Just think of all the things that are transparent and seem not to be so. Paper, for instance, is made up of transparent fibres, and it is white and opaque only for the same reason that a powder of glass is white and opaque. Oil white paper, fill up the interstices between the particles with oil so that there is no longer refraction or reflection except at the surfaces, and it becomes as transparent as glass. And not only paper, but cotton fibre, linen fibre, wool fibre, woody fibre, and bone, Kemp, flesh, Kemp, hair, Kemp, nails and nerves, Kemp, in fact the whole fabric of a man except the red of his blood and the black pigment of hair, are all made up of transparent, colourless tissue. So little suffices to make us visible one to the other. For the most part the fibres of a living creature are no more opaque than water.”

“Great Heavens!” cried Kemp. “Of course, of course! I was thinking only last night of the sea larvae and all jelly-fish!”

“Now you have me! And all that I knew and had in mind a year after I left London — six years ago. But I kept it to myself. I had to do my work under frightful disadvantages. Oliver, my professor, was a scientific bounder, a journalist by instinct, a thief of ideas — he was always prying! And you know the knavish system of the scientific world. I simply would not publish, and let him share my credit. I went on working; I got nearer and nearer making my formula into an experiment, a reality. I told no living soul, because I meant to flash my work upon the world with crushing effect and become famous at a blow. I took up the question of pigments to fill up certain gaps. And suddenly, not by design but by accident, I made a discovery in physiology.”

“Yes?”

“You know the red colouring matter of blood; it can be made white — colourless — and remain with all the functions it has now!”

Kemp gave a cry of incredulous amazement.

The Invisible Man rose and began pacing the little study. “You may well exclaim. I remember that night. It was late at night — in the daytime one was bothered with the gaping, silly students — and I worked then sometimes till dawn. It came suddenly, splendid and complete in my mind. I was alone; the laboratory was still, with the tall lights burning brightly and silently. In all my great moments I have been alone. ‘One could make an animal — a tissue — transparent! One could make it invisible! All except the pigments — I could be invisible!’ I said, suddenly realising what it meant to be an albino with such knowledge. It was overwhelming. I left the filtering I was doing, and went and stared out of the great window at the stars. ‘I could be invisible!’ I repeated.