Highness deposited the thing here. You see, it's locked up behind a glass case exactly as he left it."
A glance showed that the arrangements for guarding the treasure were indeed as strong as they were simple. A single pane of glass cut off one corner of the room, in an iron framework let into the rock walls and the wooden roof above; there was now no possibility of reopening the case without elaborate labor, except by breaking the glass, which would probably arouse the night watchman who was always within a few feet of it, even if he had fallen asleep. A close examination would have showed many more ingenious safeguards; but the eye of the Rev. Thomas Twyford, at least, was already riveted on what interested him much more—the dull silver disk which shone in the white light against a plain background of black velvet.
"St. Paul's Penny, said to commemorate the visit of St. Paul to Britain, was probably preserved in this chapel until the eighth century," Symon was saying in his clear but colorless voice. "In the ninth century it is supposed to have been carried away by the barbarians, and it reappears, after the conversion of the northern Goths, in the possession of the royal family of Gothland. His Royal Highness, the Duke of Gothland, retained it always in his own private custody, and when he decided to exhibit it to the public, placed it here with his own hand. It was immediately sealed up in such a manner—"
Unluckily at this point Summers Minor, whose attention had somewhat strayed from the religious wars of the ninth century, caught sight of a short length of wire appearing in a broken patch in the wall. He precipitated himself at it, calling out, "I say, does that connect?"
It was evident that it did connect, for no sooner had the boy given it a twitch than the whole room went black, as if they had all been struck blind, and an instant afterward they heard the dull crash of the closing door.
"Well, you've done it now," said Symon, in his tranquil fashion. Then after a pause he added, "I suppose they'll miss us sooner or later, and no doubt they can get it open; but it may take some little time."
There was a silence, and then the unconquerable Stinks observed:
"Rotten that I had to leave my electric torch."
"I think," said his uncle, with restraint, "that we are sufficiently convinced of your interest in electricity."
Then after a pause he remarked, more amiably: "I suppose if I regretted any of my own impedimenta, it would be the pipe. Though, as a matter of fact, it's not much fun smoking in the dark. Everything seems different in the dark."
"Everything is different in the dark," said a third voice, that of the man who called himself a magician. It was a very musical voice, and rather in contrast with his sinister and swarthy visage, which was now invisible. "Perhaps you don't know how terrible a truth that is. All you see are pictures made by the sun, faces and furniture and flowers and trees. The things themselves may be quite strange to you. Something else may be standing now where you saw a table or a chair. The face of your friend may be quite different in the dark."
A short, indescribable noise broke the stillness. Twyford started for a second, and then said, sharply:
"Really, I don't think it's a suitable occasion for trying to frighten a child."
"Who's a child?" cried the indignant Summers, with a voice that had a crow, but also something of a crack in it. "And who's a funk, either? Not me."
"I will be silent, then," said the other voice out of the darkness. "But silence also makes and unmakes."
The required silence remained unbroken for a long time until at last the clergyman said to Symon in a low voice:
"I suppose it's all right about air?"
"Oh, yes," replied the other aloud; "there's a fireplace and a chimney in the office just by the door."
A bound and the noise of a falling chair told them that the irrepressible rising generation had once more thrown itself across the room. They heard the ejaculation: "A chimney! Why, I'll be—" and the rest was lost in muffled, but exultant, cries.
The uncle called repeatedly and vainly, groped his way at last to the opening, and, peering up it, caught a glimpse of a disk of daylight, which seemed to suggest that the fugitive had vanished in safety. Making his way back to the group by the glass case, he fell over the fallen chair and took a moment to collect himself again. He had opened his mouth to speak to Symon, when he stopped, and suddenly found himself blinking in the full shock of the white light, and looking over the other man's shoulder, he saw that the door was standing open.
"So they've got at us at last," he observed to Symon.
The man in the black robe was leaning against the wall some yards away, with a smile carved on his face.
"Here comes Colonel Morris," went on Twyford, still speaking to Symon. "One of us will have to tell him how the light went out. Will you?"
But Symon still said nothing. He was standing as still as a statue, and looking steadily at the black velvet behind the glass screen. He was looking at the black velvet because there was nothing else to look at. St. Paul's Penny was gone.
Colonel Morris entered the room with two new visitors; presumably two new sightseers delayed by the accident. The foremost was a tall, fair, rather languid-looking man with a bald brow and a high-bridged nose; his companion was a younger man with light, curly hair and frank, and even innocent, eyes. Symon scarcely seemed to hear the newcomers; it seemed almost as if he had not realized that the return of the light revealed his brooding attitude. Then he started in a guilty fashion, and when he saw the elder of the two strangers, his pale face seemed to turn a shade paler.
"Why it's Horne Fisher!" and then after a pause he said in a low voice, "I'm in the devil of a hole, Fisher."
"There does seem a bit of a mystery to be cleared up," observed the gentleman so addressed.
"It will never be cleared up," said the pale Symon. "If anybody could clear it up, you could. But nobody could."
"I rather think I could," said another voice from outside the group, and they turned in surprise to realize that the man in the black robe had spoken again.
"You!" said the colonel, sharply. "And how do you propose to play the detective?"
"I do not propose to play the detective," answered the other, in a clear voice like a bell. "I propose to play the magician. One of the magicians you show up in India, Colonel."
No one spoke for a moment, and then Horne Fisher surprised everybody by saying, "Well, let's go upstairs, and this gentleman can have a try."
He stopped Symon, who had an automatic finger on the button, saying: "No, leave all the lights on. It's a sort of safeguard."
"The thing can't be taken away now," said Symon, bitterly.
"It can be put back," replied Fisher.
Twyford had already run upstairs for news of his vanishing nephew, and he received news of him in a way that at once puzzled and reassured him. On the floor above lay one of those large paper darts which boys throw at each other when the schoolmaster is out of the room. It had evidently been thrown in at the window, and on being unfolded displayed a scrawl of bad handwriting which ran: "Dear Uncle; I am all right. Meet you at the hotel later on," and then the signature.
Insensibly comforted by this, the clergyman found his thoughts reverting voluntarily to his favorite relic, which
