"We mustn't get like that in Department Z., Thompson."

Thompson shook his head. Time after time Sage had impressed upon the staff of Department Z. that mentally they must be elastic. "It's only a fool who is blinded by his own vapour," he had said. He had pointed out the folly of endeavouring to fit a fact by an hypothesis.

"That's all," and Malcolm Sage became absorbed in the paper before him. As he closed the door behind him Thompson winked gravely at a print upon the wall of the corridor opposite. He was wondering how it was possible for one man to watch the whole of Oxford Street for a week.

CHAPTER IV

GINGERING-UP THE ADMIRALTY

"Boss in?"

Mr. Blair started violently; he had not heard John Dene enter his room.

"Er—yes, Mr. Dene," he replied, "I'll tell him." He half rose; but before he could complete the movement John Dene had opened the door communicating with Sir Lyster's private room.

Mr. Blair sank back in his chair. He was a man who assimilated innovation with difficulty. All his life he had been cradled in the lap of "as it was in the beginning." He was a vade-mecum on procedure and the courtesies of life, which made him extremely valuable to Sir Lyster. He was a gentle zephyr, whereas John Dene was something between a sudden draught and a cyclone.