"Then you hear it too, thank G.o.d!"

"Of course I hear it. The door's open. Sorry if I wasn't meant to."

"Oh, I don't mean that," said Marriott, lowering his voice. "But I'm awfully relieved. Let me explain. Of course, if you hear it too, then it's all right; but really it frightened me more than I can tell you. I thought I was going to have brain fever, or something, and you know what a lot depends on this exam. It always begins with sounds, or visions, or some sort of beastly hallucination, and I--"

"Rot!" e.j.a.c.u.l.a.t.ed the other impatiently. "What _are_ you talking about?"

"Now, listen to me, Greene," said Marriott, as calmly as he could, for the breathing was still plainly audible, "and I'll tell you what I mean, only don't interrupt." And thereupon he related exactly what had happened during the night, telling everything, even down to the pain in his arm. When it was over he got up from the table and crossed the room.

"You hear the breathing now plainly, don't you?" he said. Greene said he did. "Well, come with me, and we'll search the room together." The other, however, did not move from his chair.

"I've been in already," he said sheepishly; "I heard the sounds and thought it was you. The door was ajar--so I went in."

Marriott made no comment, but pushed the door open as wide as it would go. As it opened, the sound of breathing grew more and more distinct.

"_Someone_ must be in there," said Greene under his breath.

"_Someone_ is in there, but _where_?" said Marriott. Again he urged his friend to go in with him. But Greene refused point-blank; said he had been in once and had searched the room and there was nothing there. He would not go in again for a good deal.

They shut the door and retired into the other room to talk it all over with many pipes. Greene questioned his friend very closely, but without illuminating result, since questions cannot alter facts.

"The only thing that ought to have a proper, a logical, explanation is the pain in my arm," said Marriott, rubbing that member with an attempt at a smile. "It hurts so infernally and aches all the way up. I can't remember bruising it, though."

"Let me examine it for you," said Greene. "I'm awfully good at bones in spite of the examiners' opinion to the contrary." It was a relief to play the fool a bit, and Marriott took his coat off and rolled up his sleeve.

"By George, though, I'm bleeding!" he exclaimed. "Look here! What on earth's this?"

On the forearm, quite close to the wrist, was a thin red line. There was a tiny drop of apparently fresh blood on it. Greene came over and looked closely at it for some minutes. Then he sat back in his chair, looking curiously at his friend's face.

"You've scratched yourself without knowing it," he said presently.

"There's no sign of a bruise. It must be something else that made the arm ache."

Marriott sat very still, staring silently at his arm as though the solution of the whole mystery lay there actually written upon the skin.

"What's the matter? I see nothing very strange about a scratch," said Greene, in an unconvincing sort of voice. "It was your cuff links probably. Last night in your excitement--"

But Marriott, white to the very lips, was trying to speak. The sweat stood in great beads on his forehead. At last he leaned forward close to his friend's face.

"Look," he said, in a low voice that shook a little. "Do you see that red mark? I mean _underneath_ what you call the scratch?"

Greene admitted he saw something or other, and Marriott wiped the place clean with his handkerchief and told him to look again more closely.

"Yes, I see," returned the other, lifting his head after a moment's careful inspection. "It looks like an old scar."

"It _is_ an old scar," whispered Marriott, his lips trembling. "_Now_ it all comes back to me."

"All what?" Greene fidgeted on his chair. He tried to laugh, but without success. His friend seemed bordering on collapse.

"Hush! Be quiet, and--I'll tell you," he said. "_Field made that scar._"

For a whole minute the two men looked each other full in the face without speaking.

"Field made that scar!" repeated Marriott at length in a louder voice.

"Field! You mean--last night?"

"No, not last night. Years ago--at school, with his knife. And I made a scar in his arm with mine." Marriott was talking rapidly now.

"We exchanged drops of blood in each other's cuts. He put a drop into my arm and I put one into his--"

"In the name of heaven, what for?"

"It was a boys' compact. We made a sacred pledge, a bargain. I remember it all perfectly now. We had been reading some dreadful book and we swore to appear to one another--I mean, whoever died first swore to show himself to the other. And we sealed the compact with each other's blood.

I remember it all so well--the hot summer afternoon in the playground, seven years ago--and one of the masters caught us and confiscated the knives--and I have never thought of it again to this day--"

"And you mean--" stammered Greene.

But Marriott made no answer. He got up and crossed the room and lay down wearily upon the sofa, hiding his face in his hands.

Greene himself was a bit non-plussed. He left his friend alone for a little while, thinking it all over again. Suddenly an idea seemed to strike him. He went over to where Marriott still lay motionless on the sofa and roused him. In any case it was better to face the matter, whether there was an explanation or not. Giving in was always the silly exit.

"I say, Marriott," he began, as the other turned his white face up to him. "There's no good being so upset about it. I mean--if it's all an hallucination we know what to do. And if it isn't--well, we know what to think, don't we?"

"I suppose so. But it frightens me horribly for some reason," returned his friend in a hushed voice. "And that poor devil--"

"But, after all, if the worst is true and--and that chap _has_ kept his promise--well, he has, that's all, isn't it?"

Marriott nodded.

"There's only one thing that occurs to me," Greene went on, "and that is, are you quite sure that--that he really ate like that--I mean that he actually _ate anything at all_?" he finished, blurting out all his thought.

Marriott stared at him for a moment and then said he could easily make certain. He spoke quietly. After the main shock no lesser surprise could affect him.

"I put the things away myself," he said, "after we had finished. They are on the third shelf in that cupboard. No one's touched 'em since."

He pointed without getting up, and Greene took the hint and went over to look.

"Exactly," he said, after a brief examination; "just as I thought. It was partly hallucination, at any rate. The things haven't been touched.

Come and see for yourself."

Together they examined the shelf. There was the brown loaf, the plate of stale scones, the oatcake, all untouched. Even the gla.s.s of whisky Marriott had poured out stood there with the whisky still in it.

"You were feeding--no one," said Greene "Field ate and drank nothing. He was not there at all!"

"But the breathing?" urged the other in a low voice, staring with a dazed expression on his face.

Greene did not answer. He walked over to the bedroom, while Marriott followed him with his eyes. He opened the door, and listened. There was no need for words. The sound of deep, regular breathing came floating through the air. There was no hallucination about that, at any rate.