By the sound of it the demonstration was hotting up. The crowd was lustily shouting fierce slogans denouncing the outrages perpetrated by the dog of an Amban. They sounded jolly obstreperous though, and what with their flaming torches and all, I hoped that Tsering would be able to keep control of the situation. Suddenly Mr Holmes stiffened. 'Don't make a sound,' he whispered. 'There's someone by the corner there. It could be our man.'

For the life of me I could not see anyone in that gloom, but as I had occasion to observe before, Mr Holmes had the most extraordinary powers of nocturnal vision. I tiptoed behind him as he moved swiftly and silently forward. An anxious whisper stopped us dead in our tracks. 'Here. Come this way,' a dark figure stepped forward out of the shadow of the wall and beckoned urgently to us.

As we got there I noticed a low door built into the legation wall. It was open. By it stood a small chap in dark-blue cotton suit of Chinese design and a black skull cap. He looked nervously around him like a scared rabbit, his prominent buck teeth emphasising the resemblance. 'Are you from the Lama Yonten?' he uttered in a croaking whisper.

'Yes.'

'Come in this way, quickly. I must close the door before someone notices.'

We entered a large courtyard filled with leather-covered chests, like the ones used to transport brick tea from China to Thibet. Probably the Amban supplemented his salary by trading in brick tea, which the Thibetans regarded as a delicacy. By the courtyard were some houses and behind them the main legation building, which was two stpries high. Dark outiines of armed spldiers could be seen moving about on the roof of this building and on the outer wall in the front. Our diminutive guide crouched behind a pile of chests and signalled us to do the same.

'Now listen carefully. I have very littie time. All the Amban's soldiers are at the front to prevent the mob from breaking down the gates. Everyone else has gone to the main legation building as it is the most defensible.'

'Where are the quarters occupied by the Amban's special guest? The one that arrived a few weeks ago.'

'Merciful Kuan-yin,' the man whispered very agitatedly. 'Keep away from him.'

'Where are they?' insisted Sherlock Holmes firmly, holding the man tightly by the shoulders.

'It's that large house… there on the left… the one nearest the wall. But I have to go now, the other servants might notice my absence.'

'You have been of great help,' said Holmes, releasing the timid fellow.

'Take care. And don't go anywhere near him! he croaked, before scurrying off across the courtyard and vanishing into a patch of shadows between some houses.

I was rather shaken, I admit, by his dire warnings, and conspicuous display of fear. But Mr Holmes seemed totally unaffected by any such terrors. Silently but surely he made directiy for the house that had been pointed out as the Dark One's quarters. I followed close at his heels. The house seemed to be unoccupied, for there were no lights shining from the windows, and no sounds of any kind either. As soon as we got to the house, Mr Holmes set about trying to open a window. With the aid of a springy dagger (which he had borrowed from Kintup) and a bit of stiff wire, he quickly managed to undo a catch and ease open a frame. He performed the task with a practised dexterity that in anyone else would be sufficient cause for grave suspicions. Once inside the room he pulled the heavy wool curtain over the window.

'Let's have some light then, Hurree.'

I slid open the shield of the lantern. We were in a small antechamber, empty save for a few small chairs around the sides. One door led through a short corridor to the front do6r. I pushed open the other to discover a large and opulent study. The room was lit by two oil lampions of Imperial Dragon design; one hung on brass chains from the ceiling, while the other rested on a small side-table. Thick damask curtains prevented the light from spilling through the windows. The study was furnished in a peculiar mixture of Oriental and European styles. The walls were covered with expensive brocade drapes on which hung heavy giltframed portraits of Manchu dignitaries in court dress. The cupboards, bookshelves, chairs and tables were made of black ebony of exquisite workmanship. The finest piece was a large desk with legs shaped like lion's paws, with a set of drawers fitted with jade knobs.

'I don't like it,' Holmes whispered, putting his lips near my ear. 'Something's not quite right here. Anyhow, we have no time to lose. Let's start with that.' He pointed to the desk.

We had just opened the third drawer when I felt a slight draft against my back, and turned around. Framed in the faint light at the doorway was the shadow of a crooked man, holding something in his hand.

'Perhaps this is what you are looking for,' he said in a low hiss that I felt I had heard somewhere before. Two Chinese soldiers in black uniforms and turbans emerged from behind him and stepped into the room, their rifles poised for action. The crooked man shuffled into the room dragging his right leg. The light revealed a cadaverous-looking blighter with a bent, broken body and a lame right leg, somewhat incongruously dressed in the rich silk robes of a high mandarin. His face was badly distorted, especially the mouth, from which a little trickle of saliva dripped. His complexion was a sickly white, and his eyes, deep within their hollow sockets, seemed to burn with a passionate light. But the most remarkable thing about him was the great bulge of his forehead, which moved and twitched on the occasions when he seemed to feel some great emotion.

'Moriarty!' cried Holmes.

My skin went cold at the name.

'Yes, it is I, Holmes.' His lips twisted in an ugly smirk. 'Come now, why do you not greet your old adversary more warmly. Are you so surprised to see him alive?'

Shocked as he must have been by the unexpected resurrection of his nemesis, Sherlock Holmes reacted with great composure.

'I must confess to just that,' admitted Holmes coolly. 'All the same, if you don't mind my saying so, you have not been wonderfully improved by your recent experiences.'

'Aaah… you mock me, Holmes. But you will pay… It was a wicked, cruel thing to throw me over the precipice… wicked! But did you know the great service you performed for me that day? You are puzzled? You think I am babbling… then listen. As I fell into space… and looked down on death, my memories suddenly came back to me. I remembered my true self… and I remembered my power… yes… my great powers. It was almost too late. I hit the side of a rock-face… and smashed my hip… my leg… my face… but then… aaaah… my power surged through me. So now I live… broken and in pain… but I live. You Holmes…'

'… will, no doubt, go the way of all flesh,' said my friend philosophically, moving a step forward. Immediately both the guards raised their weapons.

'No, no, Holmes. You will stay very still. You have so cleverly managed to give Colonel Moran the slip on every previous occasion. But this time, since you are dealing with me, his master, I must insist on a very different conclusion. So, both of you, take out your weapons… slowly. Put them on the ground… now move slowly to the other side of the room. Very good. Chen Yi, pick up the guns.'

While one guard trained his weapon on us the other stepped forward and picked up our pistols and stuck them in his belt. Moriarty hobbled painfully across the room to the ebony desk, and seated himself behind it. He then tossed the scroll he was carrying onto the desk.

'So you seek the Great Mandala. Much good will it do you, even if you have it. Fool. What can you know of its great secret, when you never even knew mine. You thought I was a genius when actually I was a man whose mind was shattered… memories lost and mental powers reduced to only the intellectual functions. But just that paltry fraction of my power – and a little help from my Chinese friends, who helped to establish me in Europe to avenge themselves against the nations that had humiliated China – was sufficient to create the greatest criminal empire in the world. What can you do against me now? Now that my powers have been restored to me.'