Excerpt from The Devil in the Marshalsea by Antonia Hodgson, plus links to reviews, author biography & more

And so I'd flung on my clothes and run out into the brightening streets to call in every debt and favour I could think of. When that wasn't enough I'd pawned everything of value, until my room was stripped as bare as a maid on her wedding night. I saved only two items of any worth – my dagger for protection and my best suit for deception. (A little swagger and a few gold buttons will open most doors in London.) My creditors had demanded half what they were owed as proof they would see the rest in good time. As the sun set I counted out what I had made: two guineas and a handful of pennies. Hardly a quarter the sum I needed.

It was then that I was forced to do what I had been avoiding all day – I turned to Charles for help. We had been as close as brothers at school and at Oxford, but in the last few years our friendship had faltered. My old companion in mischief had become the Reverend Charles Buckley, a civil, sober gentleman who gave afternoon lectures to enraptured old ladies at St George's on Hanover Square. All of this was well and good, I supposed, until he'd started to lecture me on my own behaviour. I was not an enraptured old lady. I had not seen him for several months.

Charles lived with his patron, Sir Philip Meadows, in a large house near St James' Square. It wasn't a long way from my lodgings but my footsteps were slow and heavy as I walked along Piccadilly. I couldn't bear the thought of burdening him with my troubles, and worse – I knew he would forgive me for it in a moment. I was on the brink of being ashamed of myself – an uncomfortable feeling.

Luckily, when I explained my predicament to Charles he scolded me so hard that I quite forgot to feel ashamed and swore at him for being such a damned prig.

'Oh, for heaven's sake, hand me the warrant,' he snapped and began to read. He gave a grunt of surprise. 'This is for the Marshalsea. You must know that Sir Philip is Knight Marshal?'

Must I? I knitted my brows. I tended to drift off when Charles talked about his illustrious patron and his family, except when he mentioned Sir Philip's two eldest daughters. That always roused me. 'He owns the gaol?' I guessed.

'The king owns it,' Charles replied absently, reading further. 'Sir Philip administers it in his name. Well – he hires the head keeper . . . my God, Tom – twenty pounds? You owe these men twenty pounds? That's more than I earn in six months.' He peered at the warrant, as if hoping the numbers might rearrange themselves into something smaller if he squinted hard enough.

'London is a costly place to live.'

He gestured at the gold buttons on my waistcoat. 'It needn't be.'

Another lecture. 'Very well.' I snatched the warrant from his hands and stuffed it in my pocket. 'If I promise to dress in brown stockings and drab fustian breeches from now on, will you help me?'

Charles laughed, despite himself. 'Of course I'll help you.' He pulled an iron box from a high shelf, unlocked it and tipped out a small pile of coins. 'Will this be enough?'

I counted it quickly. A little under four pounds. Even if I took every last penny, it wouldn't save me from gaol.

'I can find more,' Charles said anxiously. He stole a glance at his belongings, assessing their worth with narrowed eyes. 'It may take a little while.'

Ah, now – there it was. Now I felt ashamed. 'I will borrow this and no more,' I declared, martyr-like. 'And you will have it back, Charles – you have my word. By the end of the evening, I hope.'

I hadn't been quite that fortunate. Over five straight hours at the gaming tables I had lost and won, won and lost, never quite reaching the ten pounds my creditors had demanded. Charles – who had insisted on accompanying me – paced about, or sat in a corner chewing his nails, left the room, came back, left it again. It grew late and I lost six times in a row, leaving me with a little over five pounds – less than I had arrived with. But I was playing Faro now and in this final game I had built up my stake one card at a time. If I bet on the right card last I would double my winnings.

Excerpted from The Devil in the Marshalsea by Antonia Hodgson. Copyright © 2014 by Antonia Hodgson. Excerpted by permission of Mariner Books. All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.