Here, without doubt, was murder, and Viner’s thoughts immediately turned to two things – one the hurrying young man whose face he thought he had remembered in some vague fashion; the other the fact that a policeman was slowly pacing up the terrace close by. He turned and ran swiftly up the still deserted passage. And there was the policeman, twenty yards away, coming along with the leisureliness of one who knows that he has a certain area to patrol. He pulled himself to an attitude of watchful attention as Viner ran up to him; then suddenly recognizing Viner as a well-known inhabitant of the Square, touched the rim of his helmet. I say! said Viner in the hushed voice of one who imparts strange and confidential tidings. There’s a man lying dead in the passage round here. And without doubt murdered! There’s blood all over his shirt-front. The policeman stood stock still for the fraction of a second…