“Let us presume, for argument's sake, that the document was taken by the maid or by the valet—”
“They are both old and tried servants.”
“I understand you to say that your room is on the second floor, that there is no entrance from without, and that from within no one could go up unobserved. It must, then, be somebody in the house who has taken it. To whom would the thief take it? To one of several international spies and secret agents, whose names are tolerably familiar to me. There are three who may be said to be the heads of their profession. I will begin my research by going round and finding if each of them is at his post. If one is missing especially if he has disappeared since last night we will have some indication as to where the document has gone.”
“Why should he be missing?” asked the European Secretary. “He would take the letter to an Embassy in London, as likely as not.”
“I fancy not. These agents work independently, and their relations with the Embassies are often strained.”
The Prime Minister nodded his acquiescence.
“I believe you are right, Mr. Holmes. He would take so valuable a prize to headquarters with his own hands. I think that your course of action is an excellent one. Meanwhile, Hope, we can not neglect all our other duties on account of this one misfortune. Should there be any fresh developments during the day we shall communicate with you, and you will no doubt let us know the results of your own inquiries.”
The two statesmen bowed and walked gravely from the room.
When our illustrious visitors had departed Holmes lit his pipe in silence, and sat for some time lost in the deepest thought.
