Nicolson provides an account of the demise of a Jesuit, Henry Garnett, during the early days of James I's reign:
"He shall be strangeld, being hanged up by the Neck between Heaven and Earth, as deemed unworthy of both, or either; as likewise, that the Eyes of Men may behold, and their Hearts cotemn hom. Then he is to be cut down alive, and to have his Privy Parts cut off and burnt before his Face, as being unworthily begotten, and unfit to leave andy Generation after him. His Bowels and inlay'd Parts taken out and burnt, who inwardly had conceived and harboured in his heart such horrible Treason. After, to have his Head cut off, which has imagined the Mischief. And lastly, his Body to be quartered, and the Quarters set up in some high and eminent Place, to the View and Detestation of Men, and to beome a Prey for the Fowls of the Air." (p.115)
Things hadn't changed much 150 years later. Here's Foucault's account:
On 1 March 1757 Damiens the regicide was condemned "to make the amende honorable before the main door of the Church of Paris", where he was to be "taken and conveyed in a cart, wearing nothing but a shirt, holding a torch of burning wax weighing two pounds"; then, "in the said cart, to the Place de Grève, where, on a scaffold that will be erected there, the flesh will be torn from his breasts, arms, thighs and claves with red-hot pincers, his right hand, holding the knife with which he committed the said parricide, burnt with sulphur, and, on those places where the flesh will be torn away, poured molten lead, boiling oil, burning resin, wax and sulphur melted together and then his body drawn and quartered by four horses and his limbs and body consumed by fire, reduced to ashes and his ashes thrown to the winds" (Pièces originales..., 372-4).
"Finally, he was quartered," recounts the Gazette d'Amsterdam of 1 April 1757. "This last operation was very long, because the horses used were not accustomed to drawing; consequently, instead of four, six were needed; and when that did not suffice, they were forced, in order to cut off the wretch's thighs, to sever the sinews and hack at the joints...
"It is said that, though he was always a great swearer, no blashemy escaped his lips; but the excessive pain made him utter horrible cries, and he often repeated: 'My God, have pity on me! Jesus, help me!' The spectators were all edified by the solicitude of the parish priest of St Paul's who despite his great age did not spare himself in offering consolation to the patient."
Bouton, an officer of the watch, left us his account: "The sulphur was lit, but the flame was so poor that only the top skin of the hand was burnt, and that only slightly. Then the executioner, his sleeves rolled up, took the steel pincers, which had been especially made for the occasion, and which were about a foot and a half long, and pulled first at the calf of the right leg, then at the thigh, and from there at the two fleshy parts of the right arm; then at the breasts. Though a strong, sturdy fellow, this executioner found it so difficult to tear away the pieces of flesh that he set about the same spot two or three times, twisting the pincers as he did so, and what he took away formed at each part a wound about the size of a six-pound crown piece.
"After these tearings with the pincers, Damiens, who cried out profusely, though without swearing, raised his head and looked at himself; the same executioner dipped an iron spoon in the pot containing the boiling potion, which he poured liberally over each wound. Then the ropes that were to be harnessed to the horses were attached with cords to the patient's body; the horses were then harnessed and placed alongside the arms and legs, one at each limb.
"Monsieur Le Breton, the clerk of the court, went up to the patient several times and asked him if he had anything to say. He said he had not; at each torment, he cried out, as the damned in hell are supposed to cry out, 'Pardon, my God! Pardon, my Lord.' Despite all this pain, he raised his head from time to time and looked at himself boldly. The cords had been tied so tightly by the men who pulled the ends that they caused him indescribable pain. Monsieur le [sic] Breton went up to him again and asked him if he had anything to say; he said no. Several confessors went up to him and spoke to him at length; he willingly kissed the crucifix that was held out to him; he opened his lips and repeated: 'Pardon, Lord.'
"The horses tugged hard, each pulling straight on a limb, each horse held by an executioner. After a quarter of an hour, the same ceremony was repeated and finally, after several attempts, the direction of the horses had to be changed, thus: those at the arms were made to pull towards the head, those at the thighs towards the arms, which broke the arms at the joints. This was repeated several times without success. He raised his head and looked at himself. Two more horses had to be added to those harnessed to the thighs, which made six horses in all. Without success.
"Finally, the executioner, Samson, said to Monsieur Le Breton that there was no way or hope of succeeding, and told him to ask their Lordships if they wished him to have the prisoner cut into pieces. Monsieur Le Breton, who had come down from the town, ordered that renewed efforts be made, and this was done; but the horses gave up and one of those harnessed to the thighs fell to the ground. The confessors returned and spoke to him again. He said to them (I heard him): 'Kiss me, gentlemen.' The parish priest of St Paul's did not dare to, so Monsieur de Marsilly slipped under the rope holding the left arm and kissed him on the forehead. The executioners gathered round and Damiens told them not to swear, to carry out their task and that he did not think ill of them; he begged them to pray to God for him, and asked the parish priest of St Paul's to pray for him at the first mass.
"After two or three attempts, the executioner Samson and he who had used the pincers each drew out a knife from his pocket and cut the body at the thighs instead of severing the legs at the joints; the four horses gave a tug and carried off the two thighs after them, namely, that of the right side first, the other following; then the same was done to the arms, the shoulders, the arm-pits and the four limbs; the flesh had to be cut almost to the bone, the horses pulling hard carried off the right arm first and the other afterwards.
"When the four limbs had been pulled away, the confessors came to speak to him; but his executioner told them that he was dead, though the truth was that I saw the man move, his lower jaw moving from side to side as if he were talking. One of the executioners even said shortly afterwards that when they had lifted the trunk to throw it on the stake, he was still alive. The four limbs were untied from the ropes and thrown on the stake set up in the enclosure in line with the scaffold, then the trunk and the rest were covered with logs and faggots, and fire was put to the straw mixed with this wood.
"...In accordance with the decree, the whole was reduced to ashes. The last piece to be found in the embers was still burning at half-past ten in the evening. The pieces of flesh and the trunk had taken about four hours to burn. The officers of whom I was one, as also was my son, and a detachment of archers remained in the square until nearly eleven o'clock.