Monday, Feb. 9th, 9:30 A. M., pulse 100, temp. 103.8. There appeared to be about one-half a pint of fluid in the sack. Monday, Feb. 9th, 6:30 P. M., pulse 100, temp. 102. Tuesday, Feb. 10th, 9:30 A. M.,--the fluid in the sack has increased--perhaps a pint now in it, pulse 110, temp. 104. Wednesday, Feb 11th, 9:30 A. M.,--pulse 90, temp. not taken. Condition good. Ordered a laxative. Friday, Feb 13th,--considerable inflammation over the left iliac crest, in the centre of which, a spot as large as the thumb nail, looks gangrenous. The inflammation extends over a surface as large as the two hands. Some bullae or blebs have formed in the vicinity of the gangrenous spot. Ordered a large flaxseed poultice applied, expecting an abscess would form at this place. The cathartic moved the bowels two or three times. I will here state that the patient, after the withdrawal of the blood on Sunday, was ordered iron, quinine and whisky; twenty minims of Tr. Ferri Muriat., three grs quinia, in a tablespoonful of glycerine and a little whisky. I afterward had the quinia made into pill and left off the iron, as the latter seemed to disagree with the stomach. Saturday, Feb. 14th, 5 P. M.,--pulse 112, temp. 102.4. The inflammation over the left ilium is much better; but there is now as much inflammation over the right ilium as there was over the left. The fluid in the sinus has increased gradually since the evacuation of it with the aspirator. The inflammation that has now existed for two or three days over these parts of the sinus, led me to conclude that the blood which was left and that which had accumulated, had undergone decomposition and was now pus. I used an exploring needle and found this to be the case. I then introduced a trocar and canula, and drew off fifty ounces of pus, slightly tinged with blood. I re-adjusted the compresses and bandage over the sinus, hoping that a part of it at least would become obliterated before it became necessary to open it more freely. Feb. 15th, 5 P. M.,--pulse 112, temp. 102.5. The inflammation over that part of the sinus to the right of the spine is still about the same as yesterday; also that over the left ilium. The fluid has increased during the last twenty-four hours so that there is now nearly as much as was drawn off through the canula yesterday. I concluded that further delay to a free opening was useless; consequently with the patient lying on his right side, and near the edge of the bed, I made an opening one inch long in the lower portion of the abscess,--for I now considered it one,--near the spot where the needle of the aspirator and the trocar had been previously introduced.