“…A patient who survives the rupture of a cerebral berry aneurysm is very likely to suffer yet another haemorrhage from that aneurysm within the subsequent six weeks, and especially within the first two weeks (McKissock, 1956;McKissock, Paine, and Walsh, 1960). This is in marked contrast to primary or hypertensive intracerebral haemorrhage and bleeding from an angioma, which, though they may recur, do so at much longer intervals.…”