The light had suddenly gone out, the glimmering square of window had disappeared, and the third floor formed a dark band round the lofty building, with its tiers of shining casements. That last warning cry had been suddenly cut short. How, and by whom? The same thought occurred on the instant to us both. Holmes sprang up from where he crouched by the window.
“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.”
PART II
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.”