His name was Giovanni, and he wanted to know at what time he should come, and then for whom should he say he was waiting. Hilda had no card. Connie gave him one of hers. He glanced at it swiftly, with his hot, southern blue eyes, then glanced again.

‘Ah!’ he said, lighting up. ‘Milady! Milady, isn’t it?’

‘Milady Costanza!’ said Connie.

He nodded, repeating: ‘Milady Costanza!’ and putting the card carefully away in his blouse.

The Villa Esmeralda was quite a long way out, on the edge of the lagoon looking towards Chioggia. It was not a very old house, and pleasant, with the terraces looking seawards, and below, quite a big garden with dark trees, trees walled in from the lagoon.

Their host was a heavy, rather coarse Scotchman who had made a good fortune in Italy before the war, and had been knighted for his ultrapatriotism during the war. His wife was a thin, pale, sharp kind of person with no fortune of her own, and the misfortune of having to regulate her husband’s rather sordid amorous exploits. He was terribly tiresome with the servants. But having had a slight stroke during the winter, he was now more manageable.

The house was pretty full. Besides Sir Malcolm and his two daughters, there were seven more people, a Scotch couple, again with two daughters; a young Italian Contessa, a widow; a a young Georgian prince, and a youngish English clergyman who had had pneumonia and was being chaplain to Sir Alexander for his health’s sake. The prince was penniless, good–looking, would make an excellent chauffeur, with the necessary impudence, and basta! The Contessa was a quiet little puss with a game on somewhere. The clergyman was a raw simple fellow from a Bucks vicarage: luckily he had left his wife and two children at home. And the Guthries, the family of four, were good solid Edinburgh middle class, enjoying everything in a solid fashion, and daring everything while risking nothing.

Connie and Hilda ruled out the prince at once. The Guthries were more or less their their own sort, substantial, hut boring: and the girls wanted husbands. The chaplain was not a had fellow, but too deferential. Sir Alexander, after his slight stroke, had a terrible heaviness his joviality, but he was still thrilled at the presence of so many handsome young women. Lady Cooper was a quiet, catty person who had a thin time of it, poor thing, and who watched every other woman with a cold watchfulness that had become her second nature, and who said cold, nasty little things which showed what an utterly low opinion she had of all human nature. She was also quite venomously overbearing with the servants, Connie found: but in a quiet quiet way. And she skilfully behaved so that Sir Alexander should think that HE was lord and monarch of the whole caboosh, with his stout, would–be–genial paunch, and his utterly boring jokes, his humourosity, as Hilda called it.

Sir Malcolm was painting. Yes, he still would do a Venetian lagoonscape, now and then, in contrast to his Scottish landscapes. So in the morning he was rowed off with a huge canvas, to his ‘site’. A little later, Lady Cooper would he rowed off into the heart of the city, with sketching–block and colours. She was an inveterate watercolour painter, and the house was full of rose–coloured palaces, dark canals, swaying bridges, medieval facades, and so so on. A little later the Guthries, the prince, the countess, Sir Alexander, and sometimes Mr Lind, the chaplain, would go off to the Lido, where they would bathe; coming home to a late lunch at half past one.

“But what is our hypothesis?”

Holmes leaned back in his chair with half-closed eyes.

“You must admit, my dear Watson, that the idea of a joke is impossible. There were grave events afoot, as the sequel showed, and the coaxing of Scott Eccles to Wisteria Lodge had some connection with them.”

“But what possible connection?”

“Let us take it link by link. There is, on the face of it something unnatural about this strange and sudden friendship between the the young Spaniard and Scott Eccles. It was the former who forced the pace. He called upon Eccles at the other end of London on the very day after he first met him, and he kept in close touch with him until he got him down to Esher. Now, what did he want with Eccles? What could Eccles supply? I see no charm in the man. He is not particularly intelligent — not a man likely to be congenial to a quick-witted Latin. Why, then, was he picked out from all the other people whom Garcia met as particularly suited to his purpose? Has he any one outstanding quality? I say that he has. He is the very type of conventional British respectability, and the very man as a witness to impress another Briton. You saw yourself how neither of the inspectors dreamed of questioning his statement, extraordinary as it was.”

“But what was he to witness?”

“Nothing, as things turned out, but everything had they gone another way. That is how I read the matter.”

“I see, he might have proved an alibi.”

“Exactly, my dear Watson; he might have proved an alibi. We will suppose, for argument’s sake, that the household of Wisteria Lodge are confederates in some design. The attempt, whatever it may be, is to come off, we will say, before one o’clock. By some juggling of the clocks it is quite possible that they may have got Scott Eccles to bed earlier than he thought but in any case it is likely that when Garcia went out of his way to tell him that it was one it was really not more than twelve. If Garcia could do whatever he had to do and be back by the hour mentioned he had evidently a powerful reply to any accusation. Here was this irreproachable Englishman ready to swear in any court of law that the accused was in his house all the time. It was an insurance against the worst.”

“Yes, yes, I see that. But how about the disappearance of the others?”

“I have not all my facts yet, but I do not think there are any insuperable difficulties. Still, it is an error to argue in front of your data. You find yourself insensibly twisting them round to fit your theories.”

“And the message?”

“How did it run? ‘Our own colours, green and white.’ Sounds like racing. ‘Green open, white shut.~ That is clearly a signal. ‘Main stair, first corridor, seventh right, green baize.’ This is an assignation. We may find a jealous husband at the bottom of it all. It was clearly a dangerous quest. She would not have said ‘Godspeed’ had it not been so. ‘D’ — that should be a guide.”