“No, thank you. I’ll go in that taxi.” She gave the man an address, and stepped in, while Hugh stood bareheaded by the door.

“Don’t forget,” he said earnestly. “Any time of the day or night. And while I think of it—we’re old friends. Can that be done? In case I come and stay, you see.”

She thought for a moment and then nodded her head. “All right,” she answered. “We’ve met a lot in London during the war.”

With a grinding of gear wheels the taxi drove off, leaving Hugh with a vivid picture imprinted on his mind of blue eyes, and white teeth, and a skin like the bloom of a sun-kissed peach.

For a moment or two he stood staring after it, and then he walked across to his own car. With his mind still full of the interview he drove slowly along Piccadilly, while every now and then he smiled grimly to himself. Was the whole thing an elaborate hoax? Was the girl even now chuckling to herself at his gullibility? If so, the game had only just begun, and he had no objection to a few more rounds with such an opponent. A mere tea at the Carlton could hardly be the full extent of the jest.... And somehow deep down in his mind, he wondered whether it was a joke—whether, by some freak of fate, he had stumbled on one of those strange mysteries which up to date he had regarded as existing only in the realms of shilling shockers.

He turned into his rooms, and stood in front of the mantelpiece taking off his gloves. It was as he was about to lay them down on the table that an envelope caught his eye, addressed to him in an unknown handwriting. Mechanically he picked it up and opened it. Inside was a single half-sheet of notepaper, on which a few lines had been written in a small, neat hand.

“There are more things in Heaven and Earth, young man, than a capability for eating steak and onions, and a desire for adventure. I imagine that you possess both: and they are useful assets in the second locality mentioned by the poet. In Heaven, however, one never knows—especially with regard to the onions. Be careful.”

Drummond stood motionless for a moment, with narrowed eyes. Then he leaned forward and pressed the bell.

“Who brought this note, James?” he said quietly, as his servant came into the room.

“A small boy, sir. Said I was to be sure and see you got it most particular.” He unlocked a cupboard near the window and produced a tantalus. “Whisky, sir, or cocktail?”