“Lord Wrexborough thinks that Scotland Yard hasn’t got an officer clever enough for the dope people?”

“Quite possibly.”

“I take it that he has put up a secret service man?”

“I believe—that is, I know he has.”

Monte Irvin was watching Margaret’s face, and despite the dull misery which deadened his usually quick perceptions, he detected a heightened color and a faint change of expression. He did not question her further upon the point, but:

“God knows I welcome all the help that offers,” he said. “Lord Wrexborough is your uncle, Miss Halley; but do you think this secret commission business quite fair to Scotland Yard?”

Margaret stared for some moments at the carpet, then raised her grey eyes and looked earnestly at the speaker. She had learned in the brief time that had elapsed since this black sorrow had come upon him to understand what it was in the character of Monte Irvin which had attracted Rita. It afforded an illustration of that obscure law governing the magnetism which subsists between diverse natures. For not all the agony of mind which he suffered could hide or mar the cleanness and honesty of purpose which were Monte Irvin’s outstanding qualities.

“No,” Margaret replied, “honestly, I don’t. And I feel rather guilty about it, too, because I have been urging uncle to take such a step for quite a long time. You see”—she glanced at Irvin wistfully—“I am brought in contact with so many victims of the drug habit. I believe the police are hampered; and these people who deal in drugs manage in some way to evade the law. The Home office agent will report to a committee appointed by Lord Wrexborough, and then, you see, if it is found necessary to do so, there will be special legislation.”

Monte Irvin sighed wearily, and his glance strayed in the direction of the telephone on the side-table. He seemed to be constantly listening for something which he expected but dreaded to hear. Whenever the toy spaniel which lay curled up on the rug before the fire moved or looked towards the door, Irvin started and his expression changed.

“This suspense,” he said jerkily, “this suspense is so hard to bear.”