Then I heard the chink of metal, the sound of a key thrust into a lock, and then the cautious closing of a door. Then I found myself surrounded by nothing but darkness and silence again.

I stood there in deep thought for a minute or two. Then I groped my way cautiously to the foot of the stairs, found the heavy old-fashioned balustrade, and slowly and silently climbed the stairway.

I did not stop until I found myself on the top floor of that quiet and many-odored building. I paused there, at a standstill, peering through the darkness that surrounded me.

My search was rewarded by the discovery of one thin streak of yellow light along what must have been the bottom of a closed door. Just beyond that door, I felt, my pursuit was to come to an end.

I groped my way to the wall and tiptoed quietly forward. When I came to the door, I let my hand close noiselessly about the knob. Then, cushioning it with a firm grasp, I turned it slowly, inch by inch.

The door, I found, was locked. But inside the room I could still hear the occasional click of shoe heels and the indeterminate noises of an occupant moving quietly yet hurriedly about.

I stood there, puzzled, depressed by my first feeling of frustration. Then I made out the vague oblong of what must have been a window in the rear of a narrow hall. I tiptoed back to this window, in the hope that it might lead to something. I found, to my disappointment, that it was barred with half-inch iron rods. And this meant a second defeat.

As I tested these rods I came on one that was not so secure as the others. One quiet and steady wrench brought an end-screw bodily out of the half-rotted wood. Another patient twist or two entirely freed the other end.

I found myself armed with a four-foot bar, sharpened wedge-like at each end for its screw head. So I made my way silently back to the pencil of yellow light and the locked door above it. I stood there listening for a minute or two. All I could hear was the running of tap water and the occasional rustling of a paper. So I quietly forced the edge of my rod in between the door and its jamb, and as quietly levered the end outward.

Something had to give under that strain. I was woefully afraid that it would be the lock bar itself. This I knew would go with a snap, and promptly betray my movement. But as I increased the pressure I could see that it was the socket screws that were slowly yielding in the pine wood jamb.