'To the temple, Kratas,' I pleaded with him as I scrambled up, 'and may the sweet goddess Hapi grant we are not already too late!'

  With the evening breeze in the lateen sail we were whisked across the dark waters to the stone jetty below the temple. Kratas secured the painter to one of the mooring-rings, and made as if to follow me ashore, but I stopped him.

  'For Tanus' sake, not mine,' I told him, 'do not follow me, please.'

  He hesitated a moment, then nodded. 'I will be listening for your call.' He drew his sword and offered it to me, hilt first. 'Will you need this?'

  I shook my head. 'It is not that kind of danger. Besides, I have my dagger. But thank you for your trust.' I left him in the boat and hurried up the granite steps to the entrance of the temple of Hapi.

  The rush torches in their brackets on the tall entrance pillars threw a ruddy, wavering light that seemed to bring to life the bas-relief carvings on the walls and make them dance. The goddess Hapi is one of my favourites. Strictly speaking, she is neither god nor goddess, but a strange, bearded, hermaphroditic creature possessed of both a massive penis and an equally cavernous vagina, and bounteous breasts that give milk to all. She is the deification of the Nile, and the goddess of the harvest. The two kingdoms of Egypt and all the peoples in them depend utterly upon her and the periodic flooding of the great river which is her alter ego. She is able to change her gender or, like many of the other gods of this very Egypt, take on the shape of any animal at will. Her favourite guise is that of the hippopotamus. Despite the god's ambiguous sexuality, my mistress Lostris always considered her to be female, and so do I. The priests of Hapi may differ from us on this view.

  Her images upon the stone walls were vast and motherly. Painted in hectic primary colours of red and yellow and blue, she beamed down with the head of a kindly river-cow, and seemed to invite all of nature to be fruitful and to multiply. The implied invitation was most inappropriate to my present anxiety. It was my fear that my precious charge might even at this moment be availing herself of the goddess's indulgence.

  A priestess was kneeling at the side-altar, and I ran to her, seized her by the hem of her cape and tugged at it urgently. 'Holy sister, tell me, have you seen the Lady Lostris, daughter of the grand vizier?' There were very few citizens of Upper Egypt who did not know my mistress by sight. They all loved her for her beauty, her gay spirit and her sweet disposition, and they clustered around her and cheered her in the streets and market-places when she walked abroad.

  The priestess grinned at me, all wrinkled and toothless, and she laid one bony finger on the side of her nose with such a sly and knowing expression that all my worst fears were confirmed.

  I shook her again, but less gently. 'Where is she, revered old mother? I beseech you, speak!' But instead she wagged her head and rolled her eyes towards the portals of the inner sanctum.

  I sped across the granite flags, my heart outrunning my frantic feet, but even in my distress I wondered at the boldness of my mistress. Although as a member of the high nobility she had right of access to the holy of holies, was there another in all of Egypt who would have the nerve to choose such a place for her love tryst?

  At the entrance to the sanctum I paused. My instinct had been right. There they were, the two of them, just as I had dreaded. 1 was so obsessed by my own certainty of what was taking place that I almost yelled aloud to them to stop it. Then I checked myself.

  My mistress was fully clad, more so than was usual, for her breasts were covered and she had spread a blue woollen shawl over her head. She was kneeling before the gigantic statue of Hapi. The goddess beamed down upon her, bedecked in wreaths of blue water-lilies.

  Tanus knelt beside her. He had laid aside his weapons and his armour. They were piled at the door of the sanctuary. He was dressed only in a linen shift and short tunic, with sandals on his feet. The young couple were holding hands, and their faces were almost touching as they whispered solemnly together.

  My base suspicions were refuted, and I was struck with remorse and shame. How could I ever have doubted my mistress? Quietly I began to withdraw, although I would go only as far as the side-altar, where I would give thanks to the goddess for her protection, and from where I could keep a discreet eye on further proceedings.

  However, at that moment Lostris rose to her feet and diffidently approached the statue of the goddess. I was so enthralled by her girlish grace mat I lingered a moment longer to watch her.

  From around her neck she unclasped the lapis lazuli figurine of the goddess which I had made for her. I realized with a pang that she was about to offer it as a sacrifice. That jewel had been crafted with all my love for her, and I hated to see it leave her throat. Lostris stood on tiptoe to hang it on the idol's neck. Then she knelt and kissed the stone foot while Tanus watched, still kneeling where she had left him.

  She rose and turned to go back to him, but then she saw me in the doorway. I tried to melt away into the shadows, for I was embarrassed at having spied upon so intimate a moment. However, her face lit with joy and before I could escape, she ran to me and seized my hands.

  'Oh, Taita, I am so glad that you are here?you of all people! It is so fitting. It makes it all so perfect.' She led me forward into the sanctum and Tanus rose to his feet and came smiling to take my other hand.

  'Thank you for coming. I know we can always count upon you.' I wished that my motives had been as pure as they believed them to be, so I hid my guilty heart from them with a loving smile.

  'Kneel here!' Lostris ordered me. 'Here, where you can hear every word we say to each other. You will bear witness for us before Hapi and all the gods of Egypt.' She pressed me to my knees, and then she and Tanus resumed their places in front of the goddess and took each other's hands, looking full into each other's eyes.

  Lostris spoke first. 'You are my sun,' she whispered. 'My day is dark without you.'

  'You are the Nile of my heart,' Tanus told her quietly. "The waters of your love feed my soul.'

  'You are my man, through this world and all the worlds to come.'

  'You are my woman, and I pledge you my love. I swear it to you on the breath and the blood of Horus,' Tanus said clearly and openly, so that his voice echoed through the stone halls.

  'I take up your pledge and return it to you one hundredfold,' Lostris cried. 'No one can ever come between us. Nothing can ever part us. We are one, for ever.'

  She offered her face to his and he kissed her, deeply and lingeringly. As far as I was aware, it was the first kiss that the couple had ever exchanged. I felt that I was privileged to have witnessed such an intimate moment.

  As they embraced, a sudden chill wind off the lagoon swirled through the dimly lit halls of the temple and fluttered the torch flames, so that for an instant the faces of the two lovers blurred before my eyes and the image of the goddess seemed to stir and quiver. The wind passed as swiftly as it had come, but the whisper of it around the great stone pillars was like the distant sardonic laughter of the gods, and I shuddered with superstitious awe.

  It is always dangerous to pique the gods with extravagant demands, and Lostris had just asked for the impossible. This was the moment that for years I had known was coming, and which I had dreaded more bitterly than the day of my own death. The pledge that Tanus and Lostris had made to each other could never endure. No matter how deeply they meant it, it could never be. I felt my own heart tearing within me as, at last, they broke the kiss and both turned back to me.