I gave it a good shaking, and although it creaked fearsomely, it seemed solid enough. I took a deep breath, stepped onto the bottom rung, and up I went.
A minute later I had reached the top, and a smaller, shakier platform. Still another ladder, this one more narrow and spindly than the others, trembled alarmingly as I set foot upon it and began my slow, creeping ascent. Half way up I began counting the rungs:
"Ten (approximately). eleven. twelve. thirteen—"
My head smashed against something and for a moment I could see nothing but spinning stars. I hung on to the rungs for dear life, my head aching like a burst melon and the matchstick ladder vibrating in my hands like a plucked bowstring. I felt as if someone had scalped me.
As I reached up with one hand and felt above my broken head, my fingers closed around a wooden handle. I pushed up on it with all my remaining strength, and the trapdoor lifted.
In a flash I had scrambled out onto the roof of the tower, blinking like an owl in the sudden sunshine. From a square platform in its center, slate tiles sloped gently outwards to each of the four points of the compass.
The view was nothing short of magnificent. Across the Quad, beyond the slates of the chapel, vistas of different greens folded away into the hazy distance.
Still squinting, I stepped a little closer to the parapet, and I almost lost my life.
There was a sudden yawning hole at my feet, and I had to windmill my arms to keep from falling into it. As I teetered on the edge, I had a sickening glimpse of the cobbles far below shining blackly in the sun.
The gap was perhaps eighteen inches wide, with a half-inch raised lip around it, bridged every ten feet or so by a narrow finger of stone that joined the jutting parapet to the roof. This opening had evidently been designed to provide emergency drainage in case of unusually heavy rainfall.
I jumped carefully across the opening and looked over the waist-high battlements. Far below, the grass of the Quad spread off in three directions.
Tucked in tightly as it was against the wall of Anson House, the cobbled walk was not visible below the jutting battlements. How odd, I thought. If Mr. Twining had leapt out from these battlements, he could only have landed in the grass.
Unless, of course, in the thirty years that had gone by since the day of his death, the Quad had undergone substantial landscaping changes. Another dizzying look down through the opening behind me made it obvious that they had not: the cobbles below and the linden trees that lined them were positively ancient. Mr. Twining had fallen through this hole. Without a doubt.
There was a sudden noise behind me and I spun round. In the center of the roof a corpse hung, dangling from a gibbet. I had to fight to keep from crying out.
Like the bound body of a highwayman I had seen in the pages of the
With a loud
As I recovered from my fright, I saw that the flag was rigged so that it could be raised and lowered from below, perhaps from the porter's lodge, by an ingenious series of cables and pulleys that terminated in the weatherproof canvas casing. It was this I had mistaken for corpse and gibbet.
I grinned stupidly at my foolishness and edged cautiously closer to the mechanism for a better look. But aside from the mechanical ingenuity of the device, there was little else of interest about it.
I had just turned and was moving back towards the open gap when I tripped and fell flat on my face, my head sticking out over the edge of the abyss.
I might have broken every bone in my body but I was afraid to move. A million miles below, or so it seemed, a pair of ant-like figures emerged from Anson House and set out across the Quad.
My first thought was that I was still alive. But then as my terror subsided, anger rushed in to take its place: anger at my own stupidity and clumsiness, anger at whatever invisible witch was blighting my life with an endless chain of locked doors, barked shins, and skinned elbows.
I got slowly to my feet and dusted myself off. Not only was my dress filthy, but I had also managed somehow to rip the sole half off my left shoe. The cause of the damage was not hard to spot: I had tripped on the sharp edge of a jutting tile which, torn from its place, now lay loose on the roof looking like one of the tablets upon which Moses had been given the Ten Commandments.
I'd better replace the slate, I thought. Otherwise the inhabitants of Anson House will find rainwater showering down on their heads and it will be no one's fault but mine.