"This is certainly a most amazing business," thought Challoner; "certainly a most disquieting affair; and I cannot conceal from myself that I have become mixed up with either lunatics or malefactors. I may truly thank my stars that I am so nearly and so creditably done with it." Thus thinking, and perhaps remembering the episode of the whistle, he turned to the open window. The garden was still faintly clear; he could distinguish the stairs and terraces with which the small domain had been adorned by former owners, and the blackened bushes and dead trees that had once afforded shelter to the country birds; beyond these he saw the strong retaining wall, some thirty feet in height, which enclosed the garden to the back; and again above that, the pile of dingy buildings rearing its frontage high into the night. A peculiar object lying stretched upon the lawn for some time baffled his eyesight; but at length he had made it out to be a long ladder, or series of ladders bound into one; and he was still wondering of what service so great an instrument could be in such a scant enclosure, when he was recalled to himself by the noise of some one running violently down the stairs. This was followed by the sudden, clamorous banging of the house door; and that again, by rapid and retreating footsteps in the street. Challoner sprang into the passage. He ran from room to room, upstairs and downstairs; and in that old dingy and worm-eaten house, he found himself alone. Only in one apartment looking to the front were there any traces of the late inhabitant: a bed that had been recently slept in and not made, a chest of drawers disordered by a hasty search and on the floor a roll of crumpled paper. This he picked up. The light in this upper story looking to the front was considerably brighter than in the parlour; and he was able to make out that the paper bore the mark of the hotel at Euston, and even, by peering closely, to decipher the following lines in a very elegant and careful female hand: "DEAR M'GUIRE,--It is certain your retreat is known. We have just had another failure, clockwork thirty hours too soon, with the usual humiliating result. Zero is quite disheartened. We are all scattered, and I could find no one but the _solemn ass_ who brings you this and the money. I would love to see your meeting.--Ever yours, "SHINING EYE."