Brunetti blinked, closed his eyes for a moment, and when he opened them again, saw that it had been an illusion: the line was nothing more than the shadow created by the light coming in from his windows. Signorina Elettra paused at the door and glanced over her shoulder, and as she did another person appeared beside her.

‘Good morning, Dottore,’ she said. The man beside her smiled and said, ‘Ciao, Guido.’

To see Toni Brusca out of his office at the Commune during the working day was like seeing a badger out of its sett in daylight hours. Brusca had always made Brunetti think of that animal: thick dark hair with a white stripe running down one side; stocky, short-legged body, incredible tenacity once a subject took his interest.

‘I met Toni on the way here,’ Signorina Elettra said; Brunetti had had no idea the two were acquainted. ‘So I thought I’d show him the way to your office.’ She stepped back and gave what Brunetti recognized as her first-class smile to the visitor. This indicated either that Brusca was a good friend or, Signorina Elettra being a woman of endless and instinctive deceitfulness, that she knew the man was the head of the department of employment records at the Commune and thus a man of potential usefulness.

Brusca gave her a friendly nod and walked over to Brunetti’s desk, gazing around the office as he did so. ‘You certainly have more light than I do,’ he said with open admiration. Brunetti noticed that he carried a briefcase.

Brunetti stepped around his desk and took Brusca’s hand, then clapped him on the shoulder a few times. He nodded to Signorina Elettra, who smiled, though not her first-class smile, and left the office.