"Thank you. I will."

"What time will you come?"

The Father smiled.

"As soon as I have finished my sermon. The service is at six-thirty."

"About eight then, I suppose. Don't make the sermon too long. My number in Hyde Park Place is a hundred. Good-night to you."

He snapped an elastic band round his papers and strode off without shaking hands.

On the appointed Sunday, Father Murchison preached to a densely crowded congregation at St. Saviour's. The subject of his sermon was sympathy, and the comparative uselessness of man in the world unless he can learn to love his neighbour as himself. The sermon was rather long, and when the preacher, in his flowing, black cloak, and his hard, round hat, with a straight brim over which hung the ends of a black cord, made his way towards the Professor's house, the hands of the illuminated clock disc at the Marble Arch pointed to twenty minutes past eight.

The Father hurried on, pushing his way through the crowd of standing soldiers, chattering women and giggling street boys in their Sunday best. It was a warm April night, and, when he reached number 100, Hyde Park Place, he found the Professor bareheaded on his doorstep, gazing out towards the Park railings, and enjoying the soft, moist air, in front of his lighted passage.

"Ha, a long sermon!" he exclaimed. "Come in."

"I fear it was," said the Father, obeying the invitation. "I am that dangerous thing—an extempore preacher."