Another and stronger jerk at the door proved that it was fastened, or that something so obstructed its opening that more force, and therefore more noise, was needed. This would not do; therefore, summoning up some of my old courage and resolution which had unaccountably deserted me of late, I speedily clambered in by a small window, through the broken upper panes of which it was easy to put one’s hand to turn the catch.

Having done this, and replaced, as well as possible in the circumstances, the piece of hoarding, I allowed the constable to pass on before moving further. My heart beat high for a moment as the glare from his lantern flashed through the chinks and lighted, like the gleaming of a fire, the miserable and musty-smelling apartment; but he passed on unheedingly, unsuspicious of the stealthy intruder near him.

When he had gone, all was dark. Never will the memory of that miserable contretemps be surpassed by a more disheartening experience. It required several minutes’ careful search to find the stairs, and my hands encountered all sorts of horrible recesses, as, painfully and slowly, I felt my way about.

The only occasion like it was when, in that dreary Russian dungeon, my hands had discovered the fatal seal. My thoughts instantly reverted to that night, then many months ago, and it felt to my excited and over-wrought nerves, that every crack my fingers found were portions of the occult inscription.

As I at last ascended the stairs my memory endeavoured to recall the position of the room in which I had left the body. It was certainly at the top of the house, for our ascent, in his weak state, had occupied some time.

Arrived at the top landing I struck a match, for it was evident that it would not be observed at such a height. To my surprise there were only two rooms, both entirely empty, one so small that it certainly could not have been the one in which that eventful night had been spent. The other was also small, and had not the shape that I remembered.

Obviously there was some mistake in my calculations, and dropping the burnt match upon the carpetless boards, I resumed my search, this time in a downward direction.

And now an event happened which added increased risk to the adventure, and which, even after the lapse of many months since its occurrence, I cannot think of without a thrill of excitement.

In treading upon the match my face in some way became reversed, so that my next steps, carefully guided as I was by the wall, were in the wrong direction. The first indication I had of this was a collision, with some force, with the balustrades of the stairs. These appeared to be very old and rickety, for as my heavy frame dealt them a blow they shook and rattled ominously.

To seize them convulsively was the work of an instant; but, quick as thought, I had drawn back and thrown myself on my side.