"How much do you want?"

"No, no," she said. "I've got two hundred and fifty pounds that I want to invest; only, of course, I must have a really good investment."

"That's all right," he promised. "I'll do a bit of gambling for you."

They had left the flat behind them and were walking slowly down-stairs when suddenly from one of the doors on the landing immediately below a man slipped out, paused for a moment when he heard their footsteps descending, thought better of his timidity, hurried on down, and was out of sight before they reached the landing.

"Good Heavens!" Dorothy ejaculated, seizing her companion's arm.

"I'm afraid I've made you jumpy," he said. "Poor old Dorothy, I shall have to find a jolly good investment to make up for it."

Hausberg was quite his old suave self again; it was Dorothy who was pale and agitated now.

"It was nothing," she murmured; but it was really a great deal, because the man she had seen was Mr. Gilbert Caffyn, the secretary of the Church of England Purity Society.

Dorothy did not enjoy her motor drive that Sunday. It was pale-blue November weather with the sun like a topaz hanging low in the haze above the Surrey hills, but the knowledge that Clarehaven all this month, perhaps even for longer, had been carrying on with Lily and Sylvia when she had taken such care to keep them apart tormented her beyond any capacity to enjoy the landscape or the weather. Heartless treachery, then, was the result of being kind to old friends—and oh, what an odious world it was! There would have to be a grand breaking of friendships presently—yes, and a grand dissolution of family ties as well, for, at any rate, in the midst of this miserable and humiliating affair she had at least been granted the consolation of catching out her father, which might be useful one day. Olive wondered, when the great man left them after supper, why Dorothy had been so gloomy on the drive. She had told the story of the chimpanzee so well, and the great man had laughed more heartily over it than over anything she could remember. Why was Dorothy so sad? Was there something she had left out? Surely on Hausberg's mere word she was not thinking anything horrid about Sylvia's going for a drive with Clarehaven? They had probably just driven down to Brighton for dinner to laugh over the chimpanzee.

"I shall see Sylvia once more," said Dorothy, "and that will be for the last time."