The steps brought us to a little courtyard about which the walls of the houses rose like cliffs. We halted while Hussin listened intently. Apparently the coast was clear and our guide led us to one side, which was clothed by a stout wooden trellis. Once it may have supported fig-trees, but now the plants were dead and only withered tendrils and rotten stumps remained.
It was child’s play for Peter and me to go up that trellis, but it was the deuce and all for Blenkiron. He was in poor condition and puffed like a grampus, and he seemed to have no sort of head for heights. But he was as game as a buffalo, and started in gallantly till his arms gave out and he fairly stuck. So Peter and I went up on each side of him, taking an arm apiece, as I had once seen done to a man with vertigo in the Kloof Chimney on Table Mountain. I was mighty thankful when I got him panting on the top and Hussin had shinned up beside us.
We crawled along a broadish wall, with an inch or two of powdery snow on it, and then up a sloping buttress on to the flat roof of the house. It was a miserable business for Blenkiron, who would certainly have fallen if he could have seen what was below him, and Peter and I had to stand to attention all the time. Then began a more difficult job. Hussin pointed out a ledge which took us past a stack of chimneys to another building slightly lower, this being the route he fancied. At that I sat down resolutely and put on my boots, and the others followed. Frostbitten feet would be a poor asset in this kind of travelling.
It was a bad step for Blenkiron, and we only got him past it by Peter and I spread-eagling ourselves against the wall and passing him in front of us with his face towards us. We had no grip, and if he had stumbled we should all three have been in the courtyard. But we got it over, and dropped as softly as possible on to the roof of the next house. Hussin had his finger on his lips, and I soon saw why. For there was a lighted window in the wall we had descended.
Some imp prompted me to wait behind and explore. The others followed Hussin and were soon at the far end of the roof, where a kind of wooden pavilion broke the line, while I tried to get a look inside. The window was curtained, and had two folding sashes which clasped in the middle. Through a gap in the curtain I saw a little lamp-lit room and a big man sitting at a table littered with papers.
I watched him, fascinated, as he turned to consult some document and made a marking on the map before him. Then he suddenly rose, stretched himself, cast a glance at the window, and went out of the room, making a great clatter in descending the wooden staircase. He left the door ajar and the lamp burning.
I guessed he had gone to have a look at his prisoners, in which case the show was up. But what filled my mind was an insane desire to get a sight of his map. It was one of those mad impulses which utterly cloud right reason, a thing independent of any plan, a crazy leap in the dark. But it was so strong that I would have pulled that window out by its frame, if need be, to get to that table.
There was no need, for the flimsy clasp gave at the first pull, and the sashes swung open. I scrambled in, after listening for steps on the stairs. I crumpled up the map and stuck it in my pocket, as well as the paper from which I had seen him copying. Very carefully I removed all marks of my entry, brushed away the snow from the boards, pulled back the curtain, got out and refastened the window. Still there was no sound of his return. Then I started off to catch up the others.
I found them shivering in the roof pavilion. “We’ve got to move pretty fast,” I said, “for I’ve just been burgling old Stumm’s private cabinet. Hussin, my lad, d’you hear that? They may be after us any moment, so I pray Heaven we soon strike better going.”
Hussin understood. He led us at a smart pace from one roof to another, for here they were all of the same height, and only low parapets and screens divided them. We never saw a soul, for a winter’s night is not the time you choose to saunter on your housetop. I kept my ears open for trouble behind us, and in about five minutes I heard it. A riot of voices broke out, with one louder than the rest, and, looking back, I saw lanterns waving. Stumm had realized his loss and found the tracks of the thief.
Hussin gave one glance behind and then hurried us on at breakneck pace, with old Blenkiron gasping and stumbling. The shouts behind us grew louder, as if some eye quicker than the rest had caught our movement in the starlit darkness. It was very evident that if they kept up the chase we should be caught, for Blenkiron was about as useful on a roof as a hippo.
Presently we came to a big drop, with a kind of ladder down it, and at the foot a shallow ledge running to the left into a pit of darkness. Hussin gripped my arm and pointed down it. “Follow it,” he whispered, “and you will reach a roof which spans a street. Cross it, and on the other side
