Seventh day.--A small fungus was observed in upper part of wound, to which lint dipped in lime water was applied, and moderate pressure. The fungus continued to increase. On the eleventh and twelfth days he had slight bleedings from the scalp, which stopped spontaneously. Stupor, &c. greatly increased, but he still recognised his friends; took a very little chicken soup or beef tea daily, with lemonade, &c. for drink. On the evening of the thirteenth day bleeding to the extent of ℥iv. or v. took place from fungus: it was checked by application of saturated solution of alum, but he sunk rapidly, and died that night. _Inspection 36 hours after death._--The fungus protruded considerably beyond the scalp, and was rather larger than a hen's egg, of a dirty brown colour, and a soft spongy consistence; it completely filled up the opening made in the skull by the trephine and removal of detached bone. The pericranium to the inferior side of this opening was found detached from the bone, to the extent of a crown piece, and beneath it the bone was rough, and covered with thin purulent matter. The dura mater, for two inches around the fungus, was covered with pus; this membrane, by sloughing, had allowed the fungus to protrude, and its edges adjacent to the aperture were thickened. On removing the dura mater, the fungus was observed to arise, partly from the middle, but chiefly from the posterior lobe of the left cerebral hemisphere: it occupied a space about three inches in length, and an inch and a half in breadth, extending to within a line or two of the roof of the ventricle; at its anterior part was an abscess, containing ℥ss. of pus. The fungus seemed to be a degeneration of the cerebral substance; sections of it showed the cerebral matter first dotted with an unusual number of bloody points, then assuming a greyish colour, which gradually passed into a dirty brown. With the exception of these bloody points, the brain presented no unusual vascularity: it was quite firm, except in the immediate neighbourhood of the fungus, where it gradually became softer as the colour of the cerebral substance became deeper, till in the centre of the fungus it was nearly of a broken down consistence. A quantity of serum was found in each ventricle. Another man who had been struck by the piece of iron which fractured M'Millan's skull was brought up to the hospital at the same time. He had received the blow on the vertex of his head. On admission he was in a state of fury, requiring the efforts of several men to hold him. His head was bruised out of all shape, quite depressed behind, and a fracture also of the frontal bone; there were evident symptoms too of fracture of the base of the skull. The case was hopeless. Several large depressed and detached pieces of bone were removed, but he died a few minutes after the operation.