"An investigation in which you helped," said Colwyn, with a smile.

"I am afraid it would be stretching the fable of the mouse and the lion to suggest that I was able to help such a renowned criminal investigator as yourself," returned Sir Henry waggishly. "When Mr. Oakham learnt that you had been investigating this case he expressed a strong desire to see you."

"I am returning to London by the afternoon express, Mr. Colwyn," said the solicitor. "I should be glad if you could spare me a little of your time before I go."

"Certainly," replied Colwyn, courteously. "It had better be at once, had it not? You have not very much time at your disposal."

"If it does not inconvenience you," replied Mr. Oakham politely. "But your lunch——"

"That can wait," said the detective. "I feel deeply interested in this case of young Penreath."

"Mr. Oakham saw him this morning before coming over," said Sir Henry. "He is quite mad, and refuses to say anything. Therefore, we have come to the conclusion——"

"Really, Sir Henry, you shouldn't have said that." Mr. Oakham's tone was both shocked and expostulatory.

"Why not?" retorted Sir Henry innocently. "Mr. Colwyn knows all about it—I told him myself. I thought you wanted him to help you?"

"I am aware of that, but, my dear sir, this is an extremely delicate and difficult business. As Mr. Penreath's professional adviser, I must beg of you to exercise more reticence."