“I’ve been losing steadily for three years,” replied the young man, “and I had to go to the money-lenders long ago. I can’t get another penny from them. It’s rather funny if you think of how my uncle made his money, isn’t it? But perhaps you don’t know,” he went on hastily, seeing the blank look on Barbara’s face. “So that’s how it is,” he started afresh. “It’s all up with me, you see. I’m absolutely done for unless I can get £10,000 by next week. I’m pretty desperate, I can tell you. There’s nothing I wouldn’t do to get the money.”

He spoke in emphatic tones, and several of the passing crowd turned their heads to see who it was who so loudly published the unfortunate state of his financial affairs. Sidney was quick to realise the attention he was attracting, and lowered his voice to a more confidential pitch. Neither he nor his companion specially remarked one among those who glanced up at them on hearing the outspoken words, a small spare man with a clean-shaven face and brown hair fading to a premature greyness. Nor if they had done so would either of them have recognised in this correctly dressed, spick and span Londoner, whose well-fitting morning coat and patent leather boots so exactly resembled those worn by Sidney himself and nearly every smart young man to be met with in the Park that day, the well-known private detective, Mr. Gimblet, the man most dreaded by the criminal class of the entire kingdom.

Walking at a more rapid pace than they, he was in the act of overtaking the couple as they strolled along, when something in Sidney’s voice, a note of despairing recklessness more than the words themselves that he uttered, aroused his interest and wakened his ever ready curiosity. He continued to walk on without slackening his speed, and did not look back until he had advanced some fifty yards. Then he hesitated, loitered a moment, and finally sat down on one of the green chairs, which stood conveniently unoccupied, just before Sidney and Barbara strolled unconcernedly by.

Before they had passed, Gimblet had made a quick survey of the young man’s face, on which signs of worry and anxiety were very plainly to be noted.

“I wonder who it is,” he thought; and continued, when they had gone on, to gaze meditatively after the young people.

In his turn he failed to observe two ladies who came up in the opposite direction to that in which his head was turned. Mrs. Vanderstein observed his intent expression as she approached, and following the direction of his eyes murmured to her friend:

“Do you see that man staring at Barbara? He looks quite moonstruck. She attracts a great deal of attention. Such a dear girl, I don’t know what I should do without her.”

“You are so good to her,” murmured her companion. “The question is rather, what would she do without you? But she is certainly an attractive young person, especially to men. I wonder that you are not afraid to let that delightful nephew of yours see so much of her.”