“But are you working on that?” she asked.

Tragg eyed her narrowly. “Yes, ma’am,” he said, his voice suddenly noncommittal. “They lived in the flat below here.”

“Lived below here?” she asked, her eyes widening, and seeming suddenly to take on a darker hue.

“In the flat right below here,” Tragg repeated. “Didn’t you know it?”

There was no flicker in her glance, no waver in her eyes. “No,” she said.

“Sorry,” Tragg said, “but I’ve got to ask a few questions. Let’s go back to the night of the murder, gentle-men. Now, Gow Loong where were you?”

“Down China city. I visit my cousin.”

“How many cousins?” Tragg asked.

There was just the bare suggestion of a flicker of triumph in Gow Loong’s eyes. “Twenty-one.”

It was Miss Wickford who broke the silence with a little laugh. “Twenty-one cousins!” she exclaimed.