Now he halted in the recess of the window.

There was such a ring of conviction in his voice that I glanced up in surprise.
"My dear fellow, how can you possibly be so sure of that ?" "For the very simple reason that I see the dog himself on our very door-step, and there is the ring of its owner.

Don't move, I beg you, Watson.

He is a professional brother of yours, and your presence may be of assistance to me.

Now is the dramatic moment of fate, Watson, when you hear a step upon the stair which is walking into your life, and you know not whether for good or ill.