Mary attempted to keep to herself, occupying one small corner of the large cell which contained eleven others. She had been placed with prostitutes who had been caught at various crimes – thieving, drunkenness and destroying public or private property. At the approach of a drunken woman Mary would reveal her blackened talons and snarl. But it soon became apparent that she could not remain separate. In a gaol cell it is the strong who rule and the weak who must be made to submit. The time would come, Mary knew, when she would be subjected to the needs of the strongest in the cage. Mary waited until her fellow inmates were drunk and distracted and then she bribed a turnkey to have a tinsmith visit her.

She instructed him to make four brass rings half an inch in breadth which fitted tightly to the topmost knuckle of the second and third fingers of each hand. Mary then told the tinsmith to fashion from each band a metal talon, sharpened to a point and arched, an inch beyond the extremity of each finger, to give the effect of four vicious nails. The tinsmith delivered them the next day, demanding an extortionate price in return for his speedy workmanship. But he had created weapons for her hands most fearsome to behold and Mary was happy to pay.

Mary attached the lethal hooks to her fingers and saw that they fitted well, then she placed them in the pocket of her pinny. The final meeting with the tinsmith had taken place in the morning before eight of the clock while her cell mates still slept, snoring and blubbering and often shouting in some nightmarish dream, unaware of her newfound protection. She knew that they would soon awaken and scream for water to quench their parched tongues and cool their throbbing brows. She was now ready to make her presence felt.

Mary paid the turnkey twopence for a large bucket of water and a ladle which she placed in the corner beside her. The water was their daily entitlement, an allowance of three gallons for each communal cell. The turnkeys demanded payment for it, although it was intended that it should be free. There was very little that came free in Newgate, and starvation was as much a cause of death within its walls as was gaol fever or brutality. If the twopence was not paid the turnkey would sell the bucket of precious water for a penny to an adjacent cage or, if there was no hope of gain, place it at his feet and piss into it before handing it into the cell.

Mary waited for the first of the women to wake up. It was Ann Gower, who couldn't remember when she hadn't been on the streets. She was probably still in her thirties but the effects of gin and her brutal life had left her looking twenty years older. Two of her front teeth were missing and matted brown hair hung over her eyes, which she was now in the process of knuckling in an attempt to clear her head of the gin she'd swallowed the previous night.

'Water, where's water?' she mumbled, as she stumbled over to the bars of the bird cage. Grabbing them she shouted, 'Bring the fuckin' water!' The shrill sound of her own raised voice caused her to hold her head and groan in agony.

'Ere,' Mary said, 'Over 'ere, love.'

Ann Gower turned slowly and looked at Mary through bloodshot eyes. 'You? Little Miss 'Orner what sits in a corner?'

Mary laughed, surprised at the woman's wit considering the state of her health.

'Wotcha fuckin' laughin' at?' the other woman snarled.

Mary, still with a smile on her face, dipped the ladle into the bucket and held it up towards Ann Gower. 'Drink.'

Ann Gower's hands were shaking as she took the large wooden spoon. She brought it unsteadily up to her lips and managed to spill a good portion of it down the front of her dirty pinny and upon the floor. The remainder she drank, slurping greedily. 'More!' she demanded, handing the ladle back to Mary.

'Sorry, love, that be it, there ain't no more.' Mary calmly put the ladle back into the bucket and stood up with one hand behind her back.

'Who says?' Ann Gower advanced menacingly towards Mary.

'I says,' Mary said, keeping her voice calm. 'That be your lot, Ann Gower.'

'I spilled 'arf of it!' Ann shouted.

'That be your problem, love. Next time be more careful.' Mary's voice remained steady and betrayed none of the fear she felt in the pit of her stomach. She was ready when Ann Gower lashed out at her and her hand came swiftly from behind her back, the two brass hooks at the end of her fingers cutting a double streak of crimson straight across the line of Ann Gower's jaw.

'Jesus!' she gasped, clutching at her face in surprise. 'The fuckin' bitch cut me!'

'Don't fuck with me, Ann Gower,' Mary said defiantly.

Ann Gower took one of her hands from her cheek and saw that it was covered with blood. 'Jesus! I'm bleedin'!'

'Next time it be your eyes.'

'I only wanted some water, wotcha do that for?' Ann Gower whined.

Mary forced a grin. 'Teach you some manners, darlin'.'

Mary was only five feet and two inches and carried no lard and Ann Gower was half as heavy again and at least three inches taller. But the larger woman, her head pulsating, and her cheek burning from the savage cut to her cheek, knew the ways of the street and realised she must make her move now or be beaten. The look in Mary's clear, cold green eyes told her that she had met a formidable opponent.

'You takin' charge, then?' Ann Gower said in a much mollified voice, one hand still clutched on her bleeding face.

'Somethin' like that,' Mary said.

Ann Gower smiled, the gaps in her teeth showing as she appeared to accept. 'Can I 'ave some water then?' she said, looking directly at Mary.

'No!'

Mary's eyes held the other woman's gaze and Ann Gower took two involuntary steps backwards. The fight was over, Mary had won. She had shown she was strong enough, hard enough to win the other woman's respect, or whatever passed for respect among the dispossessed.

Mary had also proved to herself that she had not forgotten the harsh lessons of the street and now indicated the sleeping women in the cell with a jerk of her chin. 'Wake them lot up, will you, tell 'em there's water, show 'em your face, tell 'em there's more where that come from if any should want it.'

Though Mary now controlled the cell she did not try to convert it to better ways. The women became drunk at any opportunity they could get their hands on a quart of gin and the nocturnal couplings continued. But the bullying stopped, the water was equally shared among all, and the cell was cleaned.

She was challenged on several occasions by older women, emboldened by a pint of gin in their bellies. But they stood little chance against her ferocious claws, and soon the rumour grew in Newgate Gaol of Mother Mary Merciless, who sat like a vulture in a corner of the whore cage cleaned of shit and dirt. It was said that she possessed the blackened talons of a great bird of prey and, if one should venture near, great slabs of flesh would be torn off in a single terrible swipe to feed her need for fresh blood and live human flesh.

A report which appeared in the Newgate Calendar, itself treated with gross exaggeration, was turned into a scurrilous and wholly lurid pamphlet sold in the streets and at fairs and in the Vauxhall Gardens and which was entitled: 'Mother Mary Merciless, the flesh eating demon of Newgate Gaol!' It sold ten thousand copies at the full price of a penny ha'penny.

Though her infamous name did nothing but good for her reputation, increasingly Mary came to impress her cell mates with her tongue, sharp eyes and the agility of her mind. They marvelled at the rapidity with which she worked the beads and boasted to the other inmates that she could do any calculation which might come into their minds. The number of days Methuselah had lived, and then the hours and minutes. Or if an ounce of dried peas should contain one hundred peas, how many peas would there be in a two-hundred-pound sack? Though they had no hope of verifying the answers, it was the speed of Mary's fingers as they flew across the wire slides to push the blurring beads this way and that which confounded and fascinated them. With such skill, they reasoned, the answers she gave must be correct. Furthermore, if any should have any unseemly ideas, hands so cruelly tortured which could move so fast were a reminder to them all that the dreaded claws could strike before they had a chance to blink.