four o'clock
And only those raise their hands who actually saw the blow struck , and overheard _ all _ that led to it . You understand , now ? One , two , three -- seven altogether , that is quite enough . Those seven will wait in the room at four o'clock till the others have all gone . Now I will give the first class their sums . '' The afternoon passed Very slowly to teacher and pupils alike . When the clock struck four , work was put away with more than the usual noise and hurry .