My mind was spinning as fast as if I still had a fever. ‘Wait here,’ I said. ‘I’m getting my cloak.’

Before he had time to answer I turned and raced back upstairs. I pulled my cloak from the wardrobe and I pushed my icy feet into my riding boots. I was not tired now, my head was thudding with anxiety and I was shuddering with the cold, but I was in a mad rush to get downstairs again in case Will should leave, without waiting for me.

I snatched a purse full of guineas from the drawer in my desk and clattered down the stairs, hardly caring how much noise I made.

Will was still on the doorstep.

‘Come on!’ I said, pulling the door shut behind me and starting down the street at a run. ‘Is that your horse?’

Will’s big bay was tied to the railings. Will nodded and unhitched him. At my nod he threw me up to the saddle and then swung up behind me.

‘Where to?’ he asked.

‘The stables,’ I said.

We trotted around to the mews, the horse’s hooves clattering loudly on the frozen cobbles. A dog yapped inside, and we saw a light go on. I banged on the stable door and I heard the horses inside stir, then I heard someone coming down the stairs from the sleeping quarters above the stable and a voice, gruff with sleep, shout: ‘Who is it?’

‘Lady Havering!’ I yelled back. I could feel Will behind me stiffen with anger at the title, but the groom pulled back the bolts of the door and poked his head and his lantern out through the gap.

‘Lady Havering?’ he asked incredulously. Then, as he saw me, he tumbled out into the street. ‘What d’you want, your ladyship?’

‘I want to borrow your best suit, your Sunday suit,’ I said briskly. ‘I have need of it, Gerry, please.’

He blinked, owlish in the lamplight.

‘Quickly!’ I said. ‘I’ll change in your room. Give me the clothes first.’

Will dropped down to the ground and lifted me down.

‘You heard her,’ he said to the man. ‘Do as she says.’

The groom stammered, but turned inside and led the way up the rickety stairs.

‘There’s the suit I had for my brother’s wedding,’ he said. ‘He’s a tailor, he made it up for me special.’

‘Excellent,’ I said. The smarter I looked the more likely we were to pull this off.

He went to a chest in the corner of the room and lifted it out reverently. We were in luck so far, he had kept the linen with it, and a white cravat. It was a suit almost as good as a gentleman’s; in smooth cloth, not homespun. A dark grey colour. You’d expect a city clerk to wear such a suit, or even a small merchant. If Perry’s club would admit Will dressed in his brown homespun, they’d certainly admit me in this suit, if I could pass for a young man.

There was a tricorne hat with it, in matching grey, and I could swing my own cloak over the whole. My boots would have to serve. I did not want to borrow the groom’s shoes with shiny buckles, they would be obviously too big for me whereas the jacket and trousers just looked wide-cut.

I dressed as quick as if I were changing costume between acts and clattered down the stairs as Will and the groom were leading his bay horse into the stables. Will stared at me and the groom gaped.

‘My God, Lady Havering, what are you about?’ the groom exclaimed.

I brushed past him and swung my cloak around myself.

‘What d’you think?’ I demanded. ‘Would I pass as a young man, a young gentleman?’

‘Aye…’ Gerry stammered, ‘But why, your ladyship? What are you about?’

I gave a low laugh, I felt as mad as I had been with my fever.

‘Thank you for the loan of your suit…’ I said. ‘You shall have it back safe. Tell no one about this and you shall have a guinea. Have Sea and the bay ready for us at daybreak. Wait up for me.’

He would have answered, but I turned on my heel, Will at my side. His smile gleamed at me in the moonlight. I grinned back. It was good to be out of the house, and dressed easily again. It was like an enchantment to be with Will in the dark deserted streets of London. I laughed aloud.

‘Lead the way,’ I said. ‘To Perry’s club, as fast as we can.’

Will did not wait to ask me what I planned. I had known months before that moment that I loved him, but when he nodded with a smile, I loved him even more. For the way he turned and started down the street at a steady loping run, even though he did not know what the devil I was planning.

I was only half sure myself.

The new club was only minutes from home; Perry had taken a cab to it, and would have planned to reel home later. As we turned around the corner from the broad parade of Curzon Street we went arm in arm and strolled to the dark doorway, as leisurely as lords.

‘This is the place, Michael,’ Will said loudly. His voice was as clear and as commanding as a squire in the saddle. I had to bite back a smile.

‘Bang on the door, then!’ I said. I made my voice as deep as I could, and I slurred as if I were drunk. ‘Bang on the whoreson door!’

It swung open before Will raised his hand. The porter inside, dressed in a shabby livery which looked as if it had been bought off a barrow cheap, smiled at us. He had a tooth missing. He looked an utter rogue.

‘This is a private club, gentlemen,’ he said. ‘Private to the gentry and their friends.’

Thank the lord they were saving money on the lighting and the hall was illuminated only by a single candelabra, and two of the candlesticks were guttering. My face under the hat was in shadow anyway; he was looking mainly at the cut of my coat which was good, and assuring himself that, although we might look like rustics, we were neither of us the watch come to check on this new gambling hell.

‘I’m an acquaintance of Sir Henry Peters,’ I said, braggishly, like a young man. ‘Is he here tonight?’

‘Not tonight,’ said the porter. ‘But please to come in, there is a small, a very small membership fee.’

I put my hand in my pocket and at his mumble of two guineas each I tipped the gold coins into his hand. His eyes gleamed at the weight of the purse as I tucked it back inside my cape.

‘Certainly,’ he said. ‘Most certainly, this way.’

He led the way up the rickety stairs to the upper floor. I could hear the sound of voices and the chink of bottle against glass. I could hear Perry’s own voice say, ‘Gad! Against me again! My luck’s sick as a dog tonight!’

I hesitated, wondering how drunk Perry was, whether he would see my face under the heavy tricorne hat and cry out in surprise. But then the porter pushed open the door and I saw how dark and smoky it was inside, and I went on, fearless.

The smoke hung like a pall in the room, cigar smoke in thick wreaths. The stench of it made my eyes water as soon as I stepped inside, but I saw how it darkened the room so that the gamblers were squinting at their cards. No one even noticed us.

‘Waiter!’ Will said behind me.

The man appeared and Will ordered a bottle of burgundy and signed for it with a flourish. He did not once glance at me for approval. You would have thought we had been bottle companions, gambling and wenching together for years.

The porter had gone across the room to whisper in the ear of a man who was sitting sideways to the door. He glanced up towards us and rose to his feet, came across the room twirling his glossy red mustachios. ‘Captain’ Thomas, I bet silently with myself. And as like a captain in the cavalry as any fool and coward can reasonably appear. His partner at the table stayed seated. I guessed that would be Bob Redfern.

‘Morning gentlemen,’ he said. He even had the voice to perfection, the cavalry officer’s confident drawl. ‘Good of you to come to my little place here. Can I interest you in a game?’

I hesitated. I had not thought further ahead than to get to Perry before he gambled Wideacre away for ever. But he was deeper in than I had dreamed. Captain Thomas was not running a cheap little fleecing here. This was a well-staffed club with three servants at least within call and a dozen wealthy patrons, most of whom wore swords.

I looked around quickly. With his back to the entrance, slumped in his chair, was Perry. His golden curls looked dark and dirty in the flickering candlelight, his head was bowed as he stared at his hand of cards. The empty place opposite him, which had been the captain’s, was surrounded with a pile of papers and gold coins. They were unmistakably IOUs from Perry. Any one of them might be the Wideacre deeds, and Will and I were too late.

‘You certainly can,’ I said. My mouth was very dry, and my throat too tight. My voice came out a little higher than I meant, too girlish. But it did not tremble. Beside me I saw Will shift a little, like a wrestler places his feet when he is ready for a fight. I reached back to the table where our wine was poured and took a gulp.

‘What’s your game?’ I asked. I nodded towards Perry’s table with assumed confidence. ‘What are you playing?’

‘Lord Havering and I were playing piquet while waiting for a partner for whist. Perhaps you and your companion…?’

He glanced at Will who swayed on his feet. ‘I’ll sit this one out!’ he said hastily.

‘Well, let me introduce you then to Mr Redfern who will take a hand with us,’ Captain Thomas said smoothly. ‘I’m Captain Thomas, this is Lord Peregrine Havering.’ Perry glanced up, his blue eyes hooded. He blinked owlishly and slumped back down again. ‘And this is Mr Redfern. Play whist, Bob?’

Perry straightened, he looked bemusedly at me, blinking like a daylight owl. I tensed. He had seen me dressed as a lad before, that spring morning in the Havering woods when he had thought we might be friends. He stared at me.