During the rebellion of Wat Tyler, the greater part of the buildings constituting the ancient prison were burnt down, and otherwise destroyed; and, when rebuilt, the jail was strengthened and considerably enlarged. Its walls were of stone, now grim and hoary with age; and on the side next to the Fleet there was a large square structure, resembling Traitor's Gate at the Tower, and forming the sole entrance to the prison. To this gate state-offenders were brought by water after committal by the Council of the Star-Chamber.

Nothing could be sterner or gloomier than the aspect of the prison on this side—gray and frowning walls, with a few sombre buildings peeping above them, and a black gateway, with a yawning arch, as if looking ready to devour the unfortunate being who approached it. Passing through a wicket, contrived in the ponderous door, a second gate was arrived at, and this brought the captive to the porter's lodge, where he was delivered up to the jailers, and assigned a room in one of the wards, according to his means of paying for it. The best of these lodgings were but indifferent; and the worst were abominable and noisome pits.

On entering the outer ward, a strange scene presented itself to the view. Motley groups were scattered about—most of the persons composing them being clad in threadbare doublets and tattered cloaks, and wearing caps, from which the feathers and ornaments had long since disappeared; but there were a few—probably new coiners—in somewhat better attire. All these wore debtors. Recklessness and effrontery were displayed in their countenances, and their discourse was full of ribaldry and profanity. At one side of this ward there was a large kitchen, where eating and drinking were constantly going forward at little tables, as at a tavern or cookshop, and where commons were served out to the poorer prisoners.

Near this was a large hall, which served as the refectory of the prisoners for debt. It was furnished with side benches of oak, and had two long tables of the same wood; but both benches and tables were in a filthy state, and the floor was never cleansed. Indeed, every part of the prison was foul enough to breed a pestilence; and the place was seldom free from fever in consequence. The upper part of the refectory was traversed by a long corridor, on either side of which were the dormitories.

The arrangements of the inner ward were nearly similar, and differed only from the outer, in so far that the accommodations were superior, as they had need to be, considering the price asked for them; but even here nothing like cleanliness could be found. In this ward was the chapel. At a grated window in the gate stood the poor debtors rattling their begging-boxes, and endeavouring by their cries to obtain alms from the passers-by.

Below the warden's lodgings, which adjoined the gate, and which were now occupied by the deputy, Joachim Tunstall, was a range of subterranean dungeons, built below the level of the Fleet. Frequently flooded by the river, these dungeons were exceedingly damp and unwholesome; and they were reserved for such prisoners as had incurred the censure of the inexorable Court of Star-Chamber. It was in one of the deepest and most dismal of these cells that the unfortunate Sir Ferdinando Mounchensey breathed his last.

Allusion has been previously made to the influence exercised within the Fleet by Sir Giles Mompesson. Both the wardens were his friends, and ever ready to serve him; their deputy was his creature, and subservient to his will in all things; while the jailers and their assistants took his orders, whatever they might be, as if from a master. Thus he was enabled to tyrannize over the objects of his displeasure, who could never be secure from his malice.

By the modes of torture he adopted through his agents, he could break the most stubborn spirit, and subdue the strongest. It was matter of savage satisfaction to him to witness the sufferings of his victims; and he never ceased from persecution till he had obtained whatever he desired. The barbarities carried out in pursuance of the atrocious sentences of the Court of Star-Chamber were to him pleasant spectacles; and the bleeding and mutilated wretches, whom his accusations had conducted to the pillory, when brought back to their dungeons, could not escape his hateful presence—worse to them, from his fiendish derision of their agonies, than that of the executioner.