If then we ascertain by feeling externally that the stone with the shaking has fallen down to the perineum, we proceed immediately to the operation; but if it has not descended, we must introduce the index finger of the left hand well oiled, or, if an adult, the middle also, into the anus, and with the fingers in a supine direction we search with them for the stone, and, bringing it down gradually to the neck of the bladder, we fix it there, pushing it out with the finger or fingers when so fixed; and having given directions to the assistant to press down the bladder with his hands, and ordering another assistant to raise the testicles in his right hand, and with the other to stretch the perineum to the other side from that upon which the incision is to be made, we take the instrument called a lithotome, and between the anus and the testicles, not, however, in the middle of the perineum, but on one side, towards the left buttock, we make an oblique incision, cutting down direct upon the stone where it protrudes, so that the external incision may be wider, but the internal not larger than just to allow the stone to fall through it. Sometimes, from the pressure of the finger or fingers at the anus, the stone starts out readily at the same time that the incision is made, without requiring extraction; but if it does not start out of itself we must extract it with the forceps called the stone-extractor. After the removal of the stone, having stopped the bleeding by manna of frankincense and aloes, comfrey, misy, and such like styptic powders, and having dipped wool or compresses in wine and oil, we apply them; and also apply the bandages for calculous diseases, namely, that having six legs. But if there be any apprehension of hemorrhage we must apply a compress which had been soaked in oxycrate, or water and rose-oil, and placing the patient in a reclining posture, bathe the parts frequently. After the third day, having loosed the bandages, and poured much water and oil into the wound, we may dress it with the ointment called tetrapharmacon (basilicon) on a pledget, removing them and dressing often on account of the acrimony of the urine. If inflammation come on, we must have recourse to the cataplasms and fomentations proper for it. And we may also inject into the bladder oil of roses, oil of camomile, or butter, unless some inflammation prevent. In like manner, if the sore become spreading, or otherwise malignant, we must suit the applications to the state of it. When the ulcer is freed from inflammation we may loose the dressings, and use diachylon plaster to the groins and bottom of the belly. During the whole time of the treatment, the thighs must be bound together, which contributes to the cure with the other remedies. If the stone, being small, fall into the penis, and cannot be voided with the urine, we may draw the prepuce strongly forwards, and bind it at the extremity of the glans.