_Recurrent haemorrhage_ was occasionally met with both in the case of the limb and trunk vessels. In the limbs it often necessitated ligature of the artery. I saw several cases in the lower extremity where recurrent haemorrhage on the second or third day was treated by ligature of the femoral or popliteal artery, and it also occurred during the course of development of one of the carotid aneurisms recounted below. On two occasions I saw rapid death follow recurrent abdominal haemorrhage; in one I was standing in a tent when a man who had been wounded the day before suddenly exclaimed: 'Why, I am going to die after all.' The appearance of the man was ghastly, and on examining the abdomen it was found greatly distended, and with dulness in the flanks; the patient expired a few minutes later. Another example of recurrent abdominal haemorrhage is related in case 169, p. 432. _Secondary haemorrhage._--In simple wounds of the soft parts by _small-calibre bullets_ this was decidedly rare. In wounds complicated by fractures of the bones, especially when they exhibited the so-called 'explosive' character, secondary haemorrhage was not uncommon, and this not necessarily in conjunction with infection and suppuration. In the chapter on fracture some remarks will be found on the prolongation of healing often observed in the exit portion of the wound track, which is explained by the well-known fact that, given an aseptic condition of the wound, sloughs of tissue separate very slowly. Secondary haemorrhage in these cases is due to lesions of the vessel short of perforation, but severe enough to so lower the vitality that local gangrene of the wall occurs. In such instances haemorrhage most usually occurred on the tenth to the fourteenth day, but occasionally still later. In one instance of ligature of the anterior tibial artery for such haemorrhage three-quarters of the whole lumen of the vessel had been devitalised. The resemblance of some cases of secondary haemorrhage of this class to those occasionally observed after amputation, and due to accidental non-perforative injury of the artery at the time of operation above the point of ligature, was very striking. In other cases secondary haemorrhage was the result of perforation of the vessel by a sharp spicule of bone, but in the large majority sepsis and suppuration were the cause. Naturally therefore the accident was commoner in the more severe kinds of wound, and in those caused by _large_ bullets or fragments of shell. The symptoms in nearly all cases were the classical ones of repeated small haemorrhages followed by a sudden copious gush. The forms of secondary haemorrhage, however, which afforded most interest were the interstitial and the internal, mainly on account of the scope they allowed for diagnosis.