A young painter at the time. But there’s quite a long story behind it. I will tell it all to you from the beginning, and then, as you know, I want you to complete the altarpiece by putting the keystone in place. Look, the sermon is over. We should find a better place to tell stories than this church, well as it may suit our joint efforts. Let’s go.”

The painter lingered for a moment longer before turning his eyes away from the picture. It seemed even more radiant as the smoky darkness outside the windows lifted, and the mist took on a golden hue. He almost felt that if he stayed here, rapt in devout contemplation of the gentle pain on those childish lips, they would smile and reveal new loveliness. But his companion had gone ahead of him already, and he had to quicken his pace to catch up with the merchant in the porch. They left the cathedral together, as they had come.

The heavy cloak of mist thrown over the city by the early spring morning had given way to a dull, silvery light caught like a cobweb among the gabled roofs. The close-set cobblestones had a steely, damp gleam, and the first of the flickering sunlight was beginning to cast its gold on them. The two men made their way down narrow, winding alleys to the clear air of the harbour, where the merchant lived. And as they slowly walked towards it at their leisure, deep in thought and lost in memory, the merchant’s story gathered pace.

“As I have told you already,” he began, “I spent some time in Venice in my youth. And to cut a long story short, my conduct there was not very Christian. Instead of managing my father’s business in the city, I sat in taverns with young men who spent all day carousing and making merry, drinking, gambling, often bawling out some bawdy song or uttering bitter curses, and I was just as bad as the others. I had no intention of going home. I took life easy and ignored my father’s letters when he wrote to me more and more urgently and sternly, warning me that people in Venice who knew me had told him that my licentious life would be the end of me. I only laughed, sometimes with annoyance, and a quick draught of sweet, dark wine washed all my bitterness away, or if not that then the kiss of a wanton girl. I tore up my father’s letters, I had abandoned myself entirely to a life of intoxicated frenzy, and I did not intend to give it up. But one evening I was suddenly free of it all. It was very strange, and sometimes I still feel as if a miracle had cleared my path. I was sitting in my usual tavern; I can still see it today, with its smoke and vapours and my drinking companions. There were girls of easy virtue there as well, one of them very beautiful, and we seldom made merrier than that night, a stormy and very strange one. Suddenly, just as a lewd story aroused roars of laughter, my servant came in with a letter for me brought by the courier from Flanders. I was displeased. I did not like receiving my father’s letters, which were always admonishing me to do my duty and be a good Christian, two notions that I had long ago drowned in wine. But I was about to take it from the servant when up jumped one of my drinking companions, a handsome, clever fellow, a master of all the arts of chivalry. ‘Never mind the croaking old toad. What’s it to you?’ he cried, throwing the letter up in the air, swiftly drawing his sword, neatly spearing the letter as it fluttered down and pinning it to the wall. The supple blue blade quivered as it stuck there.