'My master ordered me to tie the horses to posts by the shed, where I'd put Sukey. When I got back, the brothers were unloading their cart. I'd never seen such a pile of strange stuff: a long thin brass pipe and a big metal handpump like some of the conduits have. The earl came over and said quietly, "Look over that boat with me, Jack. I want to be sure there's no trickery." I dared to ask him what it was all about, and he looked dubiously to where the brothers were unloading an iron tank of some sort; by the way they were sweating and grunting there was something heavy inside. He told me then that Sepultus was an alchemist and had promised to show us a great wonder with that apparatus. He raised an eyebrow, then walked over to the boat.
'I helped him in and he looked the ship over from end to end. We even went down to the hold and walked about, coughing for there was a little coal dust. He said to look for trickery, anything strange. But there was nothing; it was just the empty old tub I'd bought cheap from the ship merchant.
'When we got back on deck the brothers had set up their apparatus on the jetty. The metal tank had been attached to the pump at one end and to the pipe at the other. I caught a whiff of something from the tank. It was like nothing I'd ever smelt before, a harsh tang that seemed to go right up your nostrils into your skull.'
'Tell me more about how the apparatus looked.'
'The pipe was about twelve feet long, and hollow, like a gun barrel. Under the end they'd fixed a wick, a pot of string greased with candle wax. The other end was fixed to the tank, as I said.'
'How big was the tank? Enough to hold, say, a large barrelful of liquid?'
He frowned. 'Yes. Though I don't know how full it was.'
'No. I'm sorry, go on.'
'When my master and I got back on land we saw they'd heaved the tank onto a big iron tripod. To my surprise, they were trying to light a fire of sticks underneath it now, fussing about with flints.
'Then Michael Gristwood gave a great shout of excitement. "It's lit!" he cried. "It's lit! Move away, my lord, away from the pipe!" My master looked scandalized at being addressed so familiarly, but went to stand behind the brothers. I went with him, wondering what on earth was to happen.'
Barak paused a moment. He looked out over the water, swirling with little gurgling eddies as the tide swept in again.
'It happened very quickly then. Michael took a twig from the fire and lit the wick, then ran back, and he and Sepultus worked the pump up and down. I saw a movement at the front of the pipe and then a great sheet of yellow flame, a dozen feet long, shot out with a roaring sound, flew through the air and hit the boat amidships. It seemed to twist in the air like a live thing.'
'Like fire from a dragon's mouth.'
He shivered. 'Ay. The wood caught light immediately, the flames seemed to stick to it and devour it like an animal eating its way along a carcass. Some of the flames fell down on the water and by the throat of God I saw
'Then the brothers turned the pipe round at an angle, pumped again, and another long gout of flame, too bright to look at, shot out and hit the stern. It seemed to leap at it like something alive. The boat was burning merrily now. The heat from that flying fire was tremendous. I was twenty feet away but my face felt scorched. Another burst of fire, and another, and then the poor old crayer was blazing from end to end. Everywhere birds were clattering up from the marshes and flying off. By Jesu, I was frightened, I'm no godly man but I was praying to Our Lady and all the saints to protect me and if my master allowed rosaries I'd have been fondling the beads till they broke.
'We watched the boat, just a mass of flame now, clouds of thick black smoke rising into the sky. I looked at my master. He wasn't afraid, he just stood watching with his arms folded, a gleam of excitement in his eyes.