he day, in consequence, appeared
to be interminable. The great national importance of the issue, the
suspense in high quarters, the direct nature of the experiment which we
were trying--all combined to work upon my nerve. It was a relief to me
when at last, after a light dinner, we set out upon our expedition.
Lestrade and Mycroft met us by appointment at the outside of Gloucester
Road Station. The area door of Oberstein's house had been left open
the night before, and it was necessary for me, as Mycroft Holmes
absolutely and indignantly declined to climb the railings, to pass in
and open the hall door. By nine o'clock we were all seated in the
study, waiting patently for our man.

An hour passed and yet another. When eleven struck, the measured beat
of the great church clock seemed to sound the dirge of our hopes.
Lestrade and Mycroft were fidgeting in their seats and looking twice a
minute at their watches. Holmes sat silent and composed, his eyelids
half shut, but every sense on the alert. He raised his head with a
sudden jerk.

"He is coming," said he.

There had been a furtive step past the door. Now it returned. We heard
a shuffling sound outside, and then two sharp taps with the knocker.
Holmes rose, motioning us to remain seated. The gas in the hall was a
mere point of light. He opened the outer door, and then as a dark
figure slipped past him he closed and fastened it. "This way!" we
heard him say, and a moment later our man stood before us. Holmes had
followed him closely, and as the man turned with a cry of surprise and
alarm he caught him by the collar and threw him back into the room.
Before our prisoner had recovered his balance the door was shut and
Holmes standing with his back against it. The man glared round him,
staggered, and fell senseless upon the floor. With the shock, his
broad-brimmed hat flew from his head, his cravat slipped sown from his
lips, and there were the long light beard and the soft, handsome
delicate features of Colonel Valentine Walter.

Holmes gave a whistle of surprise.

"You can write me down an ass this time, Watson," said he. "This was
not the bird that I was looking for."

"Who is he?" asked Mycroft eagerly.

"The younger brother of the late Sir James Walter, the head of the
Submarine Department. Yes, yes; I see the fall of the cards. He is
coming to. I think that you had best leave his examination to me."

We had carried the prostrate body to the so