With another grunt, Brunetti folded his newspaper and excused himself to go and stand on deck, though they were only at Santa Maria del Giglio and he had another two stops before he got off.

The Paganelli was a narrow hotel, slipped in, like an architectural dash separating two capital letters, between the Danieli and the Savoia amp; Jolanda. At the desk he said he was there to meet the Doctors Crowley and was told they were already in the breakfast room. He followed the clerk’s gesture down a narrow corridor and entered a small room that held six or seven tables, at one of which the Crowleys sat. With them were another elderly couple and, between them, a woman whose appearance gave evidence of considerable assistance.

When Doctor Crowley saw Brunetti, he got to his feet and waved at him; his wife looked up and smiled a greeting. The other man at the table rose and stayed standing as Brunetti approached. One of the women smiled in Brunetti’s direction; the other did not.

The people presented to him as the Petersons were tiny, bird-like people, dressed in colours as inconspicuous as those of sparrows. She had iron grey hair that capped her head in a tight perm; he was entirely bald, his head covered with deep, sun-hardened furrows running from front to back. The woman who had not smiled, introduced as Lydia Watts, had lustrous red hair and lips the same colour. Brunetti saw her push back a vagrant curl with a hand that no surgery and no art could make look the same age as her face and hair.

The table was covered with the aftermath of breakfast: coffee cups and teapots and fragments of buttered rolls. There were two empty bread baskets and an equally empty platter that might have held meat or cheese.

After Brunetti shook hands with all of them, Dr Crowley pulled over a chair from a neighbouring table and offered it to Brunetti. He sat and when the doctor did too, looked around the table at the assembled Americans. ‘I’m grateful that you agreed to speak to me this morning,’ he said in English.