(4) A private of the 2nd Rifle Brigade was struck while doubling at Geluk, at a range of one hundred yards. The Mauser bullet entered four inches above the upper border of the left patella, internal to the mid line of the limb, and escaped in the centre of the popliteal space. The man lay in a farmhouse during the night and bled considerably from both wounds. He did not fall when struck, but could not walk. He was sent to No. 2 General Hospital in Pretoria. On arrival there the external wounds were scabbed over, and a large tumour existed beneath the entrance wound. There was much discoloration from ecchymosis, but no pulsation could be detected. The posterior tibial pulse was good. At the end of ten days pulsation became marked both in the front of the limb and in the popliteal space. There were no symptoms of nerve injury. On the thirteenth day an Esmarch's bandage was applied and Major Lougheed laid the tumour open opposite the opening in the adductor magnus. Much clot was removed, and both artery and vein, which were found divided in the adductor canal, were ligatured. The foot remained very cold for the first twenty-four hours, but otherwise progress was satisfactory, the wound healing by first intention. No pulsation was palpable in the tibials at the end of a month. For the last two cases I am very much indebted to Major Lougheed. I am glad to include them, as they illustrate one or two points of special importance. No. 3 shows the tendency to variation in the tension and firmness of the tumours, the tendency to primary contraction of the sac, followed by diffusion, and the rise of temperature often accompanying the latter occurrence. This is of great interest in relation to the similar rise of temperature seen with the increase of haemorrhage in cases of haemothorax. For purposes of comparison, the progress may well be considered alongside of that in the case related on p. 119, in which the wounded vessel was probably also the main trunk itself. No. 4 differs from any of the others in depending on a complete division of a large artery and vein. The development of the haematoma was consequently more rapid and continuous. Another point of interest was the maintenance of pulsation in the tibial vessels, in spite of complete solution of continuity in the parent trunk. That this was independent of the collateral circulation seems evident from its complete disappearance and slowness of return after ligation of the wounded vessels.