'Go across!' He stood aside, and we struggled out of the throng, kicking and shoving back those who tried to follow us. We ran out on to the bridge. So urgent was the need to reach Masara that I barely noticed the drop on either hand, and without a qualm I led them across the gaping void.

  'Where is King Arkoun?' I shouted at the guards who blocked the gateway. When they hesitated, I told them, "The mountain is high! I have urgent despatches for the king. Stand aside! Let us pass!' We barged through the open gate before they could decide to oppose us, and, with twelve good men at my back, I raced for the outer staircase that led to the upper terrace.

  There were two armed men at the door to Masara's chamber, and I rejoiced to see them. I had worried that the girl might have been moved to another part of the fort, but the presence of the guards assured me that she had not.

  'Who are you?' one of them shouted, and drew his sword. 'By wh'at authority?' He did not finish the challenge. I stepped aside and allowed Memnon and Remrem to brush past me. They flew at the guards and cut them down before they could defend themselves.

  The door to Masara's chamber was barred from within, and when we hurled our combined weight against it, there came a chorus of feminine screams and wails from the other side. At the third attempt the door gave way and I was propelled through the opening into the room beyond. It was. in deep gloom, and I could barely make out the huddle of women in the far corner.

  'Masara!' I called her name, as I plucked the wig from my head, and let my own hair fall around my shoulders. She recognized me by it.

  'Taita!' She bit the wrist of the woman who tried to hold her, and ran to me. She flung both arms around my neck, and then she looked over my shoulder and her grip slackened, her dark eyes opened wide and the colour flooded her cheeks.

  Memnon had pulled off his wig. Without it, he was strikingly and unmistakably a prince. I stepped aside and left Masara standing alone. The two of them stared at each other. Neither of them moved or spoke for what seemed like an eternity, but was a moment only. Then Masara said softly and shyly in Egyptian, 'You came. You kept your promise. I knew that you would.'

  I think that this was the only time that I ever saw Memnon at a loss. He could only nod his head, and then I witnessed an amazing phenomenon. Blood flooded up his neck and suffused his face, so that even in the gloom of the chamber it glowed. The Crown Prince of Egypt, son of Pharaoh, commander of the first division of chariots, Best of Ten Thousand, holder of the Gold of Valour, stood there blushing and as tongue-tied as a peasant clod.

  Behind me one of the women squawked like a startled hen, and before I could put out a hand to hold her, she had ducked under my arm and darted down the inner staircase. Her screams reverberated up the stairwell. 'Guards! The enemy has broken into the east wing. Come quickly!' and almost immediately there was a rush of booted feet on the staircase.

  On the instant, Memnon was transformed from the blushing young lover to a hard-faced guardsman. 'Take care of her, Tata, Let no harm come to her,' he told me grimly, and stepped past me to the head of the stairs.

  He killed the first man coming up with that classic thrust to the throat that Tanus had taught him. Then he placed his foot in the centre of his chest. As he jerked his blade free, he kicked the dead man backwards down the stair-well. The falling corpse tumbled into the other men coming up from below, and swept the stairs clean.

  Memnon looked at me. 'Do you think we can reach the gate before they close it?'

  'We must,' I answered. 'Our best route is back down the outer staircase.'

  'Remrem, lead us. Tata and the princess in the centre. I will bring up the rear-guard,' he said crisply, and stabbed the next man coming up the stairs in the eye.

  The Ethiopian dropped his weapon and clutched his face with both hands. Memnon stabbed him again through the chest and pushed him backwards down the stairs, clearing them a second time. 'Follow Remrem,' he shouted at me. 'Don't stand there. After him as fast as you can.'

  I grabbed Masara's arm, but there was no need to pull her along. She came with me readily, so quick and agile that she was leading me.

  The sunlight struck us as we ran out on to the terrace. After the dark room it dazzled me. I blinked to clear my vision, and then I looked across the causeway to the edge of the tableland on the far side of the gulf. Tanus' Shilluks were there. I saw their feathers dancing and their shields held high.

  'Kajan! Kill! Kill!' they sang, and their spear-heads were dulled with fresh blood. The panic-stricken peasants scattered before them, and they reached the head of the causeway.

  There were two or three hundred of Arkoun's soldiers there. They had the abyss at their backs, and necessity made heroes of every one of them. Now they had truly become lions. Although a score of them were driven back over the edge, and plunged to their death in the valley far below, the survivors hurled back the first charge of the Shilluk.

  I saw Tanus then, exactly where I expected him to be, holding the centre. His helmet shone like a beacon in the dark sea of Shilluk warriors. I saw him throw back his head and begin to sing.

  The savage Shilluk words carried over the gulf to where I stood on the terrace of the fortress. The men around him took up the chorus, and they surged forward, still singing. This time nothing could stand before them. They stabbed and hacked their way through the defenders, and Tanus was the first man on to the causeway. He ran lightly for such a big man, and he was still singing. His Shilluk followed him on to the stone arch, but it was so narrow that they were forced into single file.

  Tanus was halfway across, when the song died on his lips, and he stopped.

  From the gateway of Adbar Seged, below where I stood, another man stepped out on to the causeway to confront Tanus. I was looking down and so could not see his face, but there was no mistaking the weapon in his right hand. The blue sword caught the sunlight and flashed like a sheet of summer lightning.

  'Arkoun!' Tanus bellowed. 'I have been looking for you.'

  Arkoun could not understand the words, but the sense of them was unmistakable. He laughed into the wind, and his beard blew out like smoke around his goaty face.

  'I know you!' He swung the silver-blue blade around his head, and it hissed and whined in the air. 'This time I will kill you.' He started forward, out along the narrow arch of stone, running with long, lithe strides straight at Tanus.

  Tanus altered his grip on the handle of his bronze shield, and tucked his head in behind it. He now knew the power in that glittering blade, and I saw that he did not intend meeting it with his own softer bronze. Arkoun had also learned discretion from their last brief encounter. From the way he carried the blue sword, I guessed that he would not attempt another rash overhand stroke.

  As they came together, Arkoun gathered himself. I saw his shoulders brace and his weight swing forward. He used the impetus of his charge to send the straight thrust at Tanus' head. Tanus lifted the shield and caught the blue blade in the centre of the heavy bronze target. It would have snapped a sword of inferior metal, but the blue sword sheared through it as if it were goat-skin. Half its silver length was buried in the yellow bronze.

  Then I realized Tanus' intention. He twisted the shield at an angle so that the blade was trapped. Arkoun struggled to withdraw his weapon, he wrestled and heaved, throwing his full weight backwards, but Tanus had the blue sword in a vice of bronze.

  Arkoun gathered all his strength and pulled back again. This time Tanus did not resist him. He leaped forward in the direction that Arkoun was heaving, and this unexpected move threw Arkoun off-balance.