It was there, a tell-tale bit of damning evidence, in the house of death. And a series of probable consequences flashed through his mind like lightning. It was a new hat fortunately; more fortunate still, he had not yet written name or initials in it; but the maker’s mark was there for all to read, and the police would go immediately to the shop where he had bought it only two days before. Would the shop-people remember his appearance? Would his visit, the date, the conversation be recalled? He thought it was unlikely; he resembled dozens of men; he had no outstanding peculiarity. He tried to think, but his mind was confused and troubled, his heart was beating dreadfully, he felt desperately ill. He sought vainly for some story to account for his being out in the fog and far from home without a hat. No single idea presented itself. He clung to the icy railings, hardly able to keep upright, collapse very near—when suddenly a figure emerged from the fog, paused a moment to stare at him, put out a hand and caught him, and then spoke:

“You’re ill, my dear sir,” said a man’s kindly voice. “Can I be of any assistance? Come, let me help you.” He had seen at once that it was not a case of drunkenness. “Come, take my arm, won’t you? I’m a physician. Luckily, too, you are just outside my very house. Come in.” And he half dragged, half pushed O’Reilly, now bordering on collapse, up the steps and opened the door with his latch-key.

“Felt ill suddenly—lost in the fog ... terrified, but be all right soon, thanks awfully——” the Canadian stammered his gratitude, but already feeling better. He sank into a chair in the hall, while the other put down a paper parcel he had been carrying, and led him presently into a comfortable room; a fire burned brightly; the electric lamps were pleasantly shaded; a decanter of whisky and a siphon stood on a small table beside a big arm-chair; and before O’Reilly could find another word to say the other had poured him out a glass and bade him sip it slowly, without troubling to talk till he felt better.

“That will revive you. Better drink it slowly. You should never have been out a night like this. If you’ve far to go, better let me put you up——”

“Very kind, very kind, indeed,” mumbled O’Reilly, recovering rapidly in the comfort of a presence he already liked and felt even drawn to.

“No trouble at all,” returned the doctor. “I’ve been at the front, you know. I can see what your trouble is—shell-shock, I’ll be bound.”

The Canadian, much impressed by the other’s quick diagnosis, noted also his tact and kindness. He had made no reference to the absence of a hat, for instance.

“Quite true,” he said. “I’m with Dr. Henry, in Harley Street,” and he added a few words about his case. The whisky worked its effect, he revived more and more, feeling better every minute. The other handed him a cigarette; they began to talk about his symptoms and recovery; confidence returned in a measure, though he still felt badly frightened. The doctor’s manner and personality did much to help, for there was strength and gentleness in the face, though the features showed unusual determination, softened occasionally by a sudden hint as of suffering in the bright, compelling eyes. It was the face, thought O’Reilly, of a man who had seen much and probably been through hell, but of a man who was simple, good, sincere. Yet not a man to trifle with; behind his gentleness lay something very stern. This effect of character and personality woke the other’s respect in addition to his gratitude. His sympathy was stirred.

“You encourage me to make another guess,” the man was saying, after a successful reading of the impromptu patient’s state, “that you have had, namely, a severe shock quite recently, and”—he hesitated for the merest fraction of a second—“that it would be a relief to you,” he went on, the skilful suggestion in the voice unnoticed by his companion, “it would be wise as well, if you could unburden yourself to—someone—who would understand.” He looked at O’Reilly with a kindly and very pleasant smile. “Am I not right, perhaps?” he asked in his gentle tone.

“Someone who would understand,” repeated the Canadian. “That’s my trouble exactly. You’ve hit it. It’s all so incredible.”