“‘What do you think of it?’ he asked.
“‘It is like a jewel,’ I answered. ‘You may well call it the ‘sorcerer’s Magic Coffer’, if it often looks like that. It almost seems to be alive.’
“‘Do you know why it seems so?’
“‘From the glare of the light, I suppose?’
“‘Light of course,’ he answered, ‘but it is rather the disposition of light.’ As he spoke he turned up the ordinary lights of the room and switched off the special ones. The effect on the stone box was surprising; in a second it lost all its glowing effect. It was still a very beautiful stone, as always; but it was stone and no more.
“‘Do you notice anything about the arrangement of the lamps?’ he asked.
“‘No!’
“‘They were in the shape of the stars in the Plough, as the stars are in the ruby!’ The statement came to me with a certain sense of conviction. I do not know why, except that there had been so many mysterious associations with the mummy and all belonging to it that any new one seemed enlightening. I listened as Trelawny went on to explain:
“‘For sixteen years I have never ceased to think of that adventure, or to try to find a clue to the mysteries which came before us; but never until last night did I seem to find a solution. I think I must have dreamed of it, for I woke all on fire about it. I jumped out of bed with a determination of doing something, before I quite knew what it was that I wished to do. Then, all at once, the purpose was clear before me. There were allusions in the writing on the walls of the tomb to the seven stars of the Great Bear that go to make up the Plough; and the North was again and again emphasized. The same symbols were repeated with regard to the “Magic Box”, as we called it. We had already noticed those peculiar translucent spaces in the stone of the box. You remember the hieroglyphic writing had told that the jewel came from the heart of an aerolite, and that the coffer was cut from it also. It might be, I thought, that the light of the seven stars, shining in the right direction, might have some effect on the box, or something within it. I raised the blind and looked out. The Plough was high in the heavens, and both its stars and the Pole Star were straight opposite the window. I pulled the table with the coffer out into the light, and shifted it until the translucent patches were in the direction of the stars. Instantly the box began to glow, as you saw it under the lamps, though but slightly. I waited and waited; but the sky clouded over, and the light died away. So I got wires and lamps—you know how often I use them in experiments—and tried the effect of electric light. It took me some time to get the lamps properly placed, so that they would correspond to the parts of the stone, but the moment I got them right the whole thing began to glow as you have seen it.
“‘I could get no further, however. There was evidently something wanting. All at once it came to me that if light could have some effect there should be in the tomb some means of producing light, for there could not be starlight in the Mummy Pit in the cavern. Then the whole thing seemed to become clear. On the bloodstone table, which has a hollow carved in its top, into which the bottom of the coffer fits, I laid the Magic Coffer; and I at once saw that the odd protuberances so carefully wrought in the substance of the stone corresponded in a way to the stars in the constellation. These, then, were to hold lights.