But the great point was still unaccomplished. They had escaped from the New Prison, it is true; but the wall of Clerkenwell Bridewell, by which that jail was formerly surrounded, and which was more than twenty feet high, and protected by formidable and bristling _chevaux de frise_, remained to be scaled. Jack, however, had an expedient for mastering this difficulty. He ventured to the great gates, and by inserting his gimblets into the wood at intervals, so as to form points upon which he could rest his foot, he contrived, to ascend them; and when at the top, having fastened a portion of his dress to the spikes, he managed, not without considerable risk, to draw up his female companion. Once over the iron spikes, Bess exhibited no reluctance to be let down on the other side of the wall. Having seen his mistress safe down, Jack instantly descended, leaving the best part of his clothes, as a memorial of his flight, to the jailor. And thus he effected his escape from the New Prison. CHAPTER V. THE DISGUISE. In a hollow in the meadows behind the prison whence Jack Sheppard had escaped,--for, at this time, the whole of the now thickly-peopled district north of Clerkenwell Bridewell was open country, stretching out in fertile fields in the direction of Islington--and about a quarter of a mile off, stood a solitary hovel, known as Black Mary's Hole. This spot, which still retains its name, acquired the appellation from an old crone who lived there, and who, in addition to a very equivocal character for honesty, enjoyed the reputation of being a witch. Without inquiring into the correctness of the latter part of the story, it may be sufficient to state, that Black Mary was a person in whom Jack Sheppard thought he could confide, and, as Edgeworth Bess was incapable of much further exertion, he determined to leave her in the old woman's care till the following night, while he shifted for himself and fulfilled his design--for, however rash or hazardous a project might be, if once conceived, Jack always executed it,--of visiting Jonathan Wild at his house in the Old Bailey.