midnight
`` It is spirits ! '' cried Koku , as he saw himself depicted . `` I wish we had some of the other pictures to show , '' spoke Tom . `` I mean some unexpected midnight visitors . '' For several nights in succession the camera was set to `` snap '' any one who might try to enter the shop . The flashlights were also in place . Tom and Ned , the latter staying at his chum 's house that week , were beginning to think they would have their trouble for their pains .