The friar was up just before dawn and celebrated his Mass, Bonaventure and Benedicta being his only congregation. Athelstan's pleasure increased when he saw that Benedicta, her hair now braided and hidden under a wimple, had a small basket by her side in preparation for their journey to Smithfield. After Mass they talked, chatting about this and that, as they walked from Southwark across London Bridge to meet Cranston and his wife at the Golden Pig, a comfortable tavern on the city side of the river.

Lady Maude, small and pert, was cheerful as a little sparrow, welcoming Benedicta like a long lost sister. Cranston, with at least three flagons of wine down him already, was in good form, nudging Athelstan in the ribs and leering lecherously at Benedicta. After Sir John had pronounced himself refreshed they made their way up to Thames Street to the Kirtle tavern which stood on the edge of Smithfield, just under the forbidding walls of Newgate Prison.

Athelstan remembered what he had learnt from his study of the Index of Saints but decided not to confide in Sir John. The puzzle had other pieces and the friar decided to wait, although he felt guiltily that Benedicta's presence might have more to do with his tardiness than it should have.

The day had proved to be a fine one. The streets were hot and dusty, so Cranston and Athelstan's party welcomed the tavern's coolness. They sat in a corner watching the citizens of every class and station go noisily by, eager to reserve a good place from which to watch the day's events. Merchants sweltering under beaver hats, their fat wives clothed in gaudy gowns, beggars, quacks, story-tellers, hordes of apprentices, a man from the guilds. Athelstan groaned and hid his face as a crowd of parishioners led by Black Clem, Ranulf the rat-catcher and Pike the ditcher, passed the tavern door, roaring a filthy song at the top of their voices. At last Cranston finished his further refreshment and, with Benedicta so close beside him his heart kept skipping for joy, Athelstan led them out into the great cleared area of Smithfield. Three blackened crow-pecked corpses still hung from a gibbet but the crowd ignored them. The food-sellers were doing a roaring trade in spiced sausages and, beside them, water-sellers with great buckets slung round their necks sold cooling drinks to soothe the mouths of those who chewed the hot, spicy meat. Athelstan looked away, his gorge rising, after seeing Ranulf the rat-catcher sidle up beside one of these water-sellers and quietly piss into one of the buckets.

Smithfield had been specially cleared for the joust. Even the customary dung heaps and piles of ordure had been taken away. A vast open space had been cordoned off for the day. At one side was the royal enclosure with row after row of wooden seats, all covered in purple or gold cloth. In the centre a huge canopy shielded the place where the king and his leading nobility would sit. The banners of John of Gaunt, resplendent with the gaudy device of the House of Lancaster, waved lazily in the breeze. Marshalls of the royal household in their colourful tabards, white wands of office held high, directed Cranston and his party to their reserved seats.

All around them benches were quickly filling with ladies in silk gowns, giggling and chattering, who clutched velvet cushions to their bosoms as they simpered past the young men eyeing them. These gallants, with hair long and curled, and jerkins dripping pearls, proved to be raucous and strident. Cranston was merry, but some of these young men were already far gone in their cups. Athelstan ignored the lustful glances directed at Benedicta, trying to curb the sparks of jealously which flared in his heart.

Once they were seated, he looked round, studying the tournament area. The field, a great grassy plain, was divided down the centre by a huge tilt barrier covered in a black and white canvas. At the end of this barrier were the pavilions, gold, red, blue and scarlet, one for each of the jousters. Already the contestants were arriving and around each pavilion scuttled pages and squires. Armour glinted and dazzled in the sun; banners bearing the gules and lozenges, lions, wyverns and dragons of the noble houses, fluttered in the faint summer breeze. A bray of trumpets stilled the clamour, their shrill so angry the birds in the trees around Smithfield rose in noisy protesting flocks. The royal party had arrived.

Cranston pointed out John of Gaunt, Duke of Lancaster, his face cruel under blond hair, skin burnt dark from his campaigns in Castille. On either side of him stood his brothers and a collection of young lords. In the centre of the group, with one of John of Gaunt's hands on his shoulder, stood a young boy, his face white as snow under a mop of golden hair, a silver chaplet on his head. Cranston nudged and pointed again: beside the royal party Athelstan glimpsed Chief Justice Fortescue in scarlet, lined with pure white lamb's wool, Sir Richard, Lady Isabella, the priest Crispin, Master Buckingham, Dame Ermengilde, and others of their household. Athelstan was sure that they all looked his way but again came the shrill bray of the trumpets. Gaunt raised his hand as if welcoming the plaudits of the crowd. There was clapping from the claque of young courtiers around him but the London mob was silent and Athelstan remembered Cranston's mutterings about how the expensive tastes of the court, coupled with the military defeats against the French, had brought Gaunt and his party into disrepute.

'Our quarry's in sight!' Cranston whispered to the friar, though his voice carried for yards around them. Athelstan looked sideways at Benedicta and his heart lurched. She had turned slightly, staring coolly back at a young, dark-faced gallant, resplendent in red and white silks, who lounged in his seat with eyes for no one but Athelstan's fair companion. Cranston, sharp enough under his bluff, drunken exterior, caught the friar's pained glance. He leaned over and tapped Athelstan on the arm.

'The tournament is about to begin, Brother,' he said. 'Watch carefully. You may learn something about combat.'

Another shrill blast of the trumpets. Banners were lowered, and behind the pavilions came a procession led by pages in tight quilted jackets, multi-coloured hose and gaudy feathered hats. They carried huge canvas paintings depicting scenes from the Bible and classical times. Hercules fighting with the python; the slaying of Hector; the Siege of Troy; Samson amongst the Philistines; and the serpent entering Eden. Such a tableau always preceded tournaments. It was followed by musicians with tambour, fife and viol. Behind them came squires and further pages and, finally, the knights themselves, not yet armoured, their colours carried before them. The procession wound around the whole tournament area, knights and men-at-arms acknowledging the cheers and cries of the crowd.

Athelstan looked more closely at one of the paintings, a scene from the Book of Genesis, remembered something he had glimpsed in the Springall house, and he gasped. The sounds around him died away. All he could see was that crude canvas painting being carried by two pages. Of course! His stomach churned with excitement. He turned to Cranston, grabbing him by the arm.

'The paintings! The canvas paintings!' he whispered hoarsely.

Cranston looked at him blearily.

'The paintings, Sir John, in the Springall house? The canvas ones on the walls. When we first went there, they were covered in black drapes because of the mourning. Don't you remember? Genesis Chapter Three, Verse One, the serpent entering Eden! There was a painting like that in one of the galleries in SpringalPs house. Maybe that is what Sir Thomas was referring to?'

Cranston blinked. Making sure his wife did not see him, he pulled a wineskin from underneath his cloak and took a generous swig.

'I am here to enjoy myself, man,' he said hoarsely. As he put the stopper back, Athelstan's words sank in. 'My God, of course, you're right! The paintings, the three riddles. They may hold the secret!'