He came straight up to Poirot and spoke in his usual quiet, unemotional voice'.
The unemotional voice paused, by the very act injecting emotion.
The question was asked in a flat, unemotional voice.
'I'll come back some other time,' he told them in a flat, unemotional voice.
"I was seven," Hettar told him in an unemotional voice.
She should have told him in a plain unemotional voice the real reason she was there.
"You might say that," the familiar, dryly unemotional voice said.
"I just thought she forgot about me," he said on the stand in an unemotional voice.
He might have been talking about afternoon tea in that pleasant, unemotional voice.