“A charming and well-bred young woman she seems,” he admitted. “I fear that I should only be a bungler in your profession, Mr. Quest, but if there is anything I can do to help you to discover her whereabouts, you can count upon me. Personally, I am convinced that Craig will return to me with some plausible explanation as to what has happened. In that case he will doubtless bring news of the young lady.”

Quest, for the third or fourth time, moved cautiously towards the window. His expression suddenly changed. He glanced downwards, frowning slightly. An alert light flashed into his eyes.

“They’re after me!” he exclaimed. “Sit still, Professor.”

He darted into his room and reappeared again almost immediately. The Professor gave a gasp of astonishment at his altered appearance. His tweed suit seemed to have been turned inside out. There were no lapels now and it was buttoned up to his neck. He wore a long white apron; a peaked cap and a chin-piece of astonishing naturalness had transformed him into the semblance of a Dutch grocer’s boy.

“I’m off, Professor,” Quest whispered. “You shall hear from me soon. I have not been here, remember!”

He ran lightly down the steps and into the kitchen, picked up a basket, filled it haphazard with vegetables and threw a cloth over the top. Then he made his way to the front door, peered out for a moment, swung through it on to the step, and, turning round, commenced to belabour it with his fist. Two plain-clothes men stood at the end of the street. A police automobile drew up outside the gate. Inspector French, attended by a policeman, stepped out. The former looked searchingly at Quest.

“Well, my boy, what are you doing here?” he asked.

“I cannot answer get,” Quest replied, in broken English. “Ten minutes already have I wasted. I have knocked at all the doors.”

French smiled.

“You can hop it, Dutchie,” he advised. “By-the-bye, when was that order for vegetables given?” he added, frowning for a moment.