"This is serious, Watson," he cried. "There is some devilry going forward! Why should such a message stop in such a way? I should put Scotland Yard in touch with this business--and yet, it is too pressing for us to leave."
"Shall I go for the police?"
We must define the situation a little more clearly. It may bear some more innocent interpretation. Come, Watson, let us go across ourselves and see what we can make of it."
As we walked rapidly down Howe Street I glanced back at the building which we had left. There, dimly outlined at the top window, I could see the shadow of a head, a woman's head, gazing tensely, rigidly, out into the night, waiting with breathless suspense for the renewal of that interrupted message. At the doorway of the Howe Street flats a man, muffled in a cravat and greatcoat, was leaning against the railing. He started as the hall-light fell upon our faces.
"Holmes!" he cried.
"Why, Gregson!" said my companion as he shook hands with the Scotland Yard detective. "Journeys end with lovers' meetings. What brings you here?"
"The same reasons that bring you, I expect," said Gregson. "How you got on to it I can't imagine."
"Different threads, but leading up to the same tangle. I've been taking the signals."
"Yes, from that window. They broke off in the middle. We came over to see the reason. But since it is safe in your hands I see no object in continuing this business."
"Wait a bit!" cried Gregson eagerly. "I'll do you this justice, Mr. Holmes, that I was never in a case yet that I didn't feel stronger for having you on my side. There's only the one exit to these flats, so we have him safe."
"Who is he?"
"Well, well, we score over you for once, Mr. Holmes. You must give us best this time." He struck his stick sharply upon the ground, on which a cabman, his whip in his hand, sauntered over from a four-wheeler which stood on the far side of the street. "May I introduce you to Mr. Sherlock Holmes?" he said to the cabman. "This is Mr. Leverton, of Pinkerton's American Agency."
"The hero of the Long Island cave mystery?" said Holmes. "Sir, I am pleased to meet you."
The American, a quiet, businesslike young man, with a clean- shaven, hatchet face, flushed up at the words of commendation. "I am on the trail of my life now, Mr. Holmes," said he. "If I can get Gorgiano--"
"What! Gorgiano of the Red Circle?"
"Oh, he has a European fame, has he? Well, we've learned all about him in America. We KNOW he is at the bottom of fifty murders, and yet we have nothing positive we can take him on. I tracked him over from New York, and I've been close to him for a week in London, waiting some excuse to get my hand on his collar. Mr. Gregson and I ran him to ground in that big tenement house, and there's only one door, so he can't slip us. There's three folk come out since he went in, but I'll swear he wasn't one of them."