Three women stood behind the bar; one of them, seeing Brunetti enter, offered him a friendly smile. He walked towards the back and saw an elderly couple at the last table on the left. They had to be Americans. They might as well have been draped in the flag. White-haired, both of them, they gave the bizarre impression that they were dressed in each other’s clothing. The woman wore a checked flannel shirt and a pair of thick woollen slacks, while the man wore a pink V-necked sweater, a pair of dark trousers, and white tennis shoes. Both apparently had their hair cut by the same hand. One could not say, exactly, that hers was longer: it was merely less short.

‘Excuse me,’ Brunetti said in English as he approached their table. ‘Were you out in the campo earlier?’

‘When the man was killed?’ the woman asked.

‘Yes,’ Brunetti said.

The man pulled out a chair for Brunetti and, with old-fashioned courtesy, got to his feet and waited until Brunetti was seated. ‘I’m Guido Brunetti, from the police,’ he began. ‘I’d like to talk to you about what you saw.’

Both of them had the faces of mariners: eyes narrowed in a perpetual squint, wrinkles seared into place by too much sun, and a sharpness of expression that even heavy seas would not disturb.

The man put out his hand, saying, ‘I’m Fred Crowley, officer, and this is my wife, Martha.’ When Brunetti released his hand, the woman stretched hers out, surprising him with the strength of her grip.

‘We’re from Maine,’ she said. ‘Biddeford Pool,’ she specified, and then, as though that were not enough, added, ‘It’s on the coast.’

‘How do you do,’ Brunetti said, an old-fashioned phrase he had forgotten he knew. ‘Could you tell me what you saw, Mr and Mrs Crowley?’ How strange this was, he the impatient Italian and these the Americans who needed to go through the slow ritual of courtesy before getting down to the matter at hand.