The Grell Mystery. Frank Froest

and as he did so a shrill, ear-piercing blast rang out. Green was close behind him.

      She shrieked as the detective tore the whistle from her, and he felt her slender figure entwine itself about him. Down he went, with his companion on top of him, and another woman’s loud hysterical cries added to the pandemonium. Foyle picked himself up and, lifting the girl bodily, flung her without ceremony into the room from which she had emerged. From above a voice shouted something, and a knife whizzed downwards and struck quivering in the bare boards of the landing, grazing Green’s shoulders.

      All need for caution was gone now. Foyle had dropped his jemmy and his hand closed over his pistol. Only as a last resource would he use it, but if he had to—well, there could be no harm in having it handy. A door slammed as the two detectives climbed the second flight of stairs. Green flung himself against the one that had been indicated by Israels, and the flimsy fastening gave way under the shock of his thirteen stone. There was no one in the room. Savagely Heldon Foyle turned and caught the handle of a second door. It turned, and they entered the room, empty like the first, but with an open window looking out on a series of low roofs a dozen feet below. And over the roofs a shadowy figure of a man was clambering hurriedly. He could only dimly be seen.