“Queer grammar!” said Holmes with a smile as he handed the paper back to the inspector. “Did you notice how the ‘he’ suddenly changed to ‘my’? The writer was so carried away by his own story that he imagined himself at the supreme moment to be the hero.”

“It seemed mighty poor stuff,” said the inspector as he replaced it in his book. “What! are you off, Mr. Holmes?”

“I don’t think there is anything more for me to do now that the case is in such capable hands. By the way, Mrs. Maberley, did you say you wished to travel?”

“It has always been my dream, Mr. Holmes.”

“Where would you like to go — Cairo, Madeira, the Riviera?”

“Oh if I had the money I would go round the world.”

“Quite so. Round the world. Well, good-morning. I may drop you a line in the evening.” As we passed the window I caught a glimpse of the inspector’s smile and shake of the head. “These clever fellows have always a touch of madness.” That was what I read in the inspector’s smile.

“Now, Watson, we are at the last lap of our little journey,” said Holmes when we were back in the roar of central London once more. “I think we had best clear the the matter up at once, and it would be well that you should come with me, for it is safer to have a witness when you are dealing with such a lady as Isadora Klein.”

We had taken a cab and were speeding to some address in Grosvenor Square. Holmes had been sunk in thought, but he roused himself suddenly.

“By the way, Watson, I suppose you see it all clearly?”

“No, I can’t say that I do. I only gather that we are going to see the lady who is behind all this mischief.”

“Exactly! But does the name Isadora Klein convey nothing to you? She was, of course, the celebrated beauty. There was never a woman to touch her. She is pure Spanish, the real blood of the masterful Conquistadors, and her people have been leaders in Pernambuco for generations. She married the aged German sugar king, Klein, and presently found herself the richest as well as the most lovely widow upon earth. Then there was an interval of adventure when she pleased her own tastes. She had several lovers, and Douglas Maberley, one of the most striking men in London, was one of them. It was by all accounts more than an adventure with him. He was not a society butterfly but a strong, proud man who gave and expected all. But she is the ‘belle dame sans merci’ of fiction. When her caprice is satisfied the matter is ended, and if the other party in the matter can’t take her word for it she knows how to bring it home to him.”

“Then that was his own story —”

“Ah! you are piecing it together now. I hear that she is about to marry the young Duke of Lomond, who might almost be her son. His Grace’s ma might overlook the age, but a big scandal would be a different matter, so it is imperative — Ah! here we are.”

"Whom did she ask for?"

"M. Michel Beaumont," replied the servant.

"Queer. And why has she called?"

"All she said was that it was about the Enghien business... So I thought that... "

"What! The Enghien business! Then she knows that I am mixed up in that business... She knows that, by applying here... "

"I could not get anything out of her, but I thought, all the same, that I had better let her in."

"Quite right. Where is she?"

"In the drawing-room. I've put on the lights."

Lupin walked briskly across the hall and opened the door of the drawing-room:

"What are you talking about?" he said, to his man. "There's no one here."

"No one here?" said Achille, running up.

And the room, in fact, was empty.

"Well, on my word, this takes the cake!" cried the servant. "It wasn't twenty minutes ago that I came and had a look, to make sure. She was sitting over there. And there's nothing wrong with my eyesight, you know."

"Look here, look here," said Lupin, irritably. "Where were you while the woman was waiting?"

"In the hail, governor! I never left the hail for a second! I should have seen her go out, blow it!"

"Still, she's not here now... "

"So I see," moaned the man, quite flabbergasted.

"She must have got tired of waiting and gone away. But, dash it all, I should like to know how she got out!"

"How she got out?" said Lupin. "It doesn't take a wizard to tell that."

"What do you mean?"

"She got out through the window. Look, it's still ajar We are on the ground-floor... The street is almost always deserted, in the evenings. There's no doubt about it."

He had looked around him and satisfied himself that nothing had been taken away or moved. The room, for that matter, contained no knicknack of any value, no important paper that might have explained the woman's visit, followed by her sudden disappearance. And yet why that inexplicable flight?

"Has any one telephoned?" he asked.

"No."

"Any letters?"

"Yes, one letter by the last post."

"Where is it?"

"I put it on your mantel-piece, governor, as usual."

Lupin's bedroom was next to the drawing-room, but Lupin had permanently bolted the door between the two. He, therefore, had to go through the hall again.

Lupin switched on the electric light and, the next moment, said:

"I don't see it... "

"Yes... I put it next to the flower-bowl."

"There's nothing here at all."

"You must be looking in the wrong place, governor."

But Achille moved the bowl, lifted the clock, bent down to the grate, in vain: the letter was not there.

"Oh blast it, blast it!" he muttered. "She's done it... she's taken it... And then, when she had the letter, she cleared out... Oh, the slut!... "

Lupin said:

"You're mad! There's no way through between the two rooms."

"Then who did take it, governor?"

They were both of them silent. Lupin strove to control his anger and collect his ideas. He asked:

"Did you look at the envelope?"

"Yes."

"Anything particular about it?"

""Yes, it looked as if it had been written in a hurry, or scribbled, rather."