Here the schooner rolled to leeward, and the Captain had to reach for the bulwark to steady himself. Taking advantage of the pause, Zachary said quickly: 'Well, actually, sir, I'm not here about Mr Crowle. It's about something else.'

'Oh!' This seemed to knock the wind out of Captain Chillingworth, for he began to scratch his balding head. 'Are you sure it can't wait?'

'Since I'm here, sir, maybe we should just get it done with?'

'Very well,' said the Captain. 'I suppose we may as well sit down then. It's too blashy to be on our feet.'

The only source of light in the stateroom was a lamp with a blackened chimney. Dim though it was, the flame seemed too bright for the Captain and he held up a hand to shield his eyes as he crossed the cabin to seat himself at his desk.

'Go on, Reid,' he said, nodding at the armchair on the other side of the desk. 'Sit yourself down.'

'Yes, sir.'

Zachary was about to sit when he glimpsed a long, lacquered object lying on the upholstery. He picked it up and found it warm to the touch: it was a pipe, with a bulb the size of a man's thumbnail, sitting on a stem that was as thin as a finger and as long as an arm. It was beautifully crafted, with carved knuckles that resembled the nodes of a stalk of bamboo.

The Captain too had caught sight of the pipe: half rising to his feet, he thumped his fist on his thigh, as if to chide himself for his absent-mindedness. But when Zachary held the pipe out to him, he accepted with an unaccustomedly gracious gesture, extending both his hands and bowing, in a fashion that seemed more Chinese than European. Then, placing the pipe on the desk, he cradled his jowls in his palm and stared at it in silence, as though he were trying to think of some way of accounting for its presence in his stateroom.

At last, he stirred and cleared his throat. 'You're not a fool on the march, Reid,' he said. 'I'm sure you know what this is and what it's used for. I'll be bail'd if I make any apologies for it, so please don't be expecting any.'

'I wasn't, sir,' said Zachary.

'You were bound to find out sooner or later, so maybe it's for the best. It's scarcely a secret.'

'None of my business, sir.'

'On the contrary,' said the Captain, with a wry smile, 'in these waters it's everyone's business and it'll be yours, too, if you intend to continue as a seaman: you'll be stowing it, packing it, selling it… and I know of no salt who doesn't sample his cargo from time to time, especially when it's of a kind that might help him forget the blores and bottom-winds that are his masters of misrule.'

The Captain's chin had sunk into his jowls now, but his voice had grown steadier and stronger. 'A man's not a sailor, Reid, if he doesn't know what it's like to be becalmed in a dead-lown, and there's this to be said for opium that it works a strange magic with time. To go from one day to another, or even one week to the next, becomes as easy as stepping between decks. You may not credit it – I didn't myself until I had the misfortune of having my vessel detained for many months in a ghastly little port. It was somewhere on the Sula Sea – as ugly a town as I've ever seen; the kind of place where all the giglets are travesties, and you can't step ashore for fear of being becketed by the forelift. Never had I felt as flat aback as I did in those months, and when the steward, a Manila-man, offered me a pipe, I confess I took it with a will. No doubt you expect me to blame myself for my weakness – but no sir, I do not regret what I did. It was a gift like none I've ever known. And like all the gifts that Nature gives us – fire, water and the rest – it demands to be used with the greatest care and caution.'

The Captain looked up to fix his glowing eyes briefly on Zachary. 'There were many years, believe me, when I smoked no more than a single pipe each month – and if you should happen to think that such moderation is not possible, then I would have you know that not only is it possible, it is even the rule. They are fools, sir, who imagine that everyone who touches a pipe is condemned instantly to wither away in a smoke-filled den. The great majority of those who chase the dragon, I'll wager, do so only once or twice a month – not for nip-cheesing reasons at that, but because it is that very restraint that produces the most exquisite, the most refined pleasure. There are some, of course, who know with their first taste that they will never leave that smoky paradise – those are the true addicts and they are born, not made. But for the common run of men – and I include myself in that number – to come unballasted over the black mud takes something else, some turn of fate, some vulnerability of fortune… or perhaps, as was the case with me, reverses of a personal nature, that happened to coincide with a debilitating illness. Certainly, at the time when it happened, I could not have had a better remedy for my ills…'

The Captain broke off to glance at Zachary. 'Tell me, Reid: do you know what the most miraculous property of this substance is?'

'No, sir.'

'I will tell you then: it kills a man's desires. That is what makes it manna for a sailor, balm for the worst of his afflictions. It calms the unceasing torment of the flesh that pursues us across the seas, drives us to sin against Nature…'

The Captain looked down at his hands, which had begun to shake. 'Come, Reid,' he said suddenly. 'We've wasted enough breath. Since we are launched on this tack, let me ask: would you not like to try a whiff? You will not be able to avoid this experiment forever, I assure you – curiosity alone will drive you to it. You would be amazed…' – he broke off with a laugh – 'oh you'd be amazed by the passengers I've known who've wanted to hoist the smoke-sail: Bible-thumping devil-scolders; earnest Empire-builders; corseted matrons, impregnable in their primness. If you're to sail the opium route, there will come a day when you, too, will bleed the monkey. So why not now? Is it not as good a time as any?'

Zachary stared, as if hypnotized, at the pipe and its delicate, polished stem. 'Why yes, sir,' he said. 'I should like that.'

'Good.'

Reaching into a drawer, the Captain brought out a box which was, in the lacquered sheen of its gloss, every bit a match for his pipe. When he opened the lid, several objects were revealed to be lying inside, on a lining of red silk, nested ingeniously together. One by one, like an apothecary at a counter, the Captain picked the objects apart and placed them on the table in front of him: a needle with a metal tip and a bamboo stem; a long-handled spoon of similar design; a tiny silver knife; a small round container, made of ivory and so ornately carved that Zachary would not have been surprised to see a ruby or diamond lying inside. But instead there was a lump of opium, dull in appearance, muddy in colour and texture. Arming himself with the knife, Captain Chillingworth cut off a minuscule piece and placed it in the bowl of the long-handled spoon. Then, removing the chimney from the lamp, he held the spoon directly over the flame, keeping it there until the gum changed consistency and turned liquid. Now, with the ceremonious air of a priest performing a ritual of communion, he handed Zachary the pipe: 'Be sure to work your bellows hard when I put the droplet in: a gulp or two is all you'll get before it's gone.' Now, moving with the greatest care, the Captain dipped the needle's tip into the opium and held it over the flame. As soon as the drop began to sizzle, he thrust it into the pipe's bulb. 'Yes! Now! let not a wisp escape!'

Zachary put the stem to his lips and drew in a breath of rich, oily smoke.

'Work the pump! Hold it in!'

After Zachary had drawn on the stem twice more, the pipe was exhausted of its smoke.

'Sit back in your chair,' said Captain Chillingworth. 'Do you feel it? Has the earth lost its hold on your body yet?'