A white-haired woman was standing in front of the trader’s sheet when he collapsed. When she saw him fall, she called out to her husband, who had been separated from her, and knelt beside the fallen man.

She saw the blood that seeped out from under him, staining the sheet red. Her husband, alarmed by her cry and her sudden sinking to the ground, pushed roughly through their friends and knelt beside her. He moved to put a protective arm around her shoulder, but then he saw the man on the sheet. He placed his hand at the man’s throat, kept it there for long seconds, then removed it and got to his feet awkwardly, his knees reluctant with age. He bent and helped his wife to stand.

They looked around and saw only the people in their group, all gaping back and forth between each other’s confused faces and the man who lay at their feet. On either side of the broad street extended the rows of outspread sheets, most still covered with neatly positioned bags. As the crowd in front of them turned away one by one, the buskers stopped playing.

It was another few minutes before the first Italian approached, and when he saw the black man, the sheet, and the blood, he pulled his telefonino from the pocket of his coat and dialled 113.

2

The police arrived with a speed that astonished the Italian bystanders as much as it scandalized the Americans. To Venetians, half an hour did not seem a long time for the police to organize a boat and a squad of technicians and officers and reach Campo Santo Stefano, but by that time most of the Americans had drifted away in exasperation, telling one another that they would meet back at the hotel.