“I was obeying orders in keeping strictly out of sight,” he explained. “I was not near enough to recognise him. Once before, some one left by the same door at about the same time, but he looked behind in the park and saw me, so nothing happened.”

“If you saw this person enter these premises at that hour of the morning,” the Chief Constable enquired, “why did you not follow, in case Mr. Johnson needed assistance?”

“My express orders were that he should do nothing of the sort,” the latter intervened. “I wished, for many reasons, to keep the matter in my own hands. I have been used to scraps,” he went on, “in every part of the world. I understand jiu-jitsu, boxing and how to draw a gun as quickly as any one. I never dreamed that I might be outwitted. The visitor from the Hall who stole the manuscripts last night was too clever for me.

“Now, sir,” Mr. Johnson continued impressively, “I want everything done in an orthodox fashion, and I know very well your prejudice, and a very natural one, against the interference of private detectives. Mr. Fielding will withdraw from the case from now onwards, but I do expect that, on the basis of the information you have already received, you will at once proceed with the necessary enquiries.”

“I have no alternative but to do so,” the Chief Constable admitted reluctantly. “I must warn you, however, that I shall do so in the manner which seems to me the most desirable. I shall approach Sir Bertram himself.”

“You will use your own discretion, of course,” Mr. Johnson said, “but action must be taken at once. There mustn’t be time for any one to slip off abroad, or anything of that sort. And I want you to remember this, Major—when you’ve found last night’s burglar, and that ought not to be a difficult job, you should also be able to solve the mystery of my poor friend Endacott’s murder.”

“That may be so, Mr. Johnson,” the other answered, a little sadly. “I can only say that I sincerely hope not. We shall probably meet later in the day.”

“I shall be here or in the neighbourhood,” the other promised.

The Chief Constable and his subordinate entered the car and drove off. They swung round the corner of the lane and a dozen curious pairs of eyes saw them turn in at the park gates.

“What do you think of this, Cloutson?” the former asked.