“It was the next morning that I realized that I had only exchanged one trouble for another.  My husband’s anguish at the loss of his paper went to my heart.  I could hardly prevent myself from there and then kneeling down at his feet and telling him what I had done.  But that again would mean a confession of the past.  I came to you that morning in order to understand the full enormity of my offence.  From the instant that I grasped it my whole mind was turned to the one thought of getting back my husband’s paper.  It must still be where Lucas had placed it, for it was concealed before this dreadful woman entered the room.  If it had not been for her coming, I should not have known where his hiding-place was.  How was I to get into the room?  For two days I watched the place, but the door was never left open.  Last night I made a last attempt.  What I did and how I succeeded, you have already learned.  I brought the paper back with me, and thought of destroying it, since I could see no way of returning it without confessing my guilt to my husband.  Heavens, I hear his step upon the stair!”

The European Secretary burst excitedly into the room.  “Any news, Mr. Holmes, any news?” he cried.

“I have some hopes.”

“Ah, thank heaven!” His face became radiant.  “The Prime Minister is lunching with me.  May he share your hopes?  He has nerves of steel, and yet I know that he has hardly slept since this terrible event.  Jacobs, will you ask the Prime Minister to come up?  As to you, dear, I fear that this is a matter of politics.  We will join you in a few minutes in the dining-room.”

The Prime Minister’s manner was subdued, but I could see by the gleam of his eyes and the twitchings of his bony hands that he shared the excitement of his young colleague.

“I understand that you have something to report, Mr. Holmes?”

“Purely negative as yet,” my friend answered.  “I have inquired at every point where it might be, and I am sure that there is no danger to be apprehended.”

“But that is not enough, Mr. Holmes.  We cannot live forever on such a volcano.  We must have something definite.”

“I am in hopes of getting it.  That is why I am here.  The more I think of the matter the more convinced I am that the letter has never left this house.”

“Mr. Holmes!”

“If it had it would certainly have been public by now.”

“But why should anyone take it in order to keep it in his house?”

“I am not convinced that anyone did take it.”

“Then how could it leave the despatch-box?”

“I am not convinced that it ever did leave the despatch-box.”

“Mr. Holmes, this joking is very ill-timed.  You have my assurance that it left the box.”

“Have you examined the box since Tuesday morning?”

“No.  It was not necessary.”

“You may conceivably have overlooked it.”

“Impossible, I say.”