midnight
`` Shadows ca n't do any harm . '' `` No , but it takes some one or something to make a shadow , and I 'd like to know what it was . I 'll take a look around in the morning , '' said Mr. Bobbsey . `` We do n't want Twin Camp spoiled by midnight scares . '' `` Maybe we 'd better get another dog , if Snap does n't come back , '' suggested his wife . `` I 'll think about that . We ca n't very well train Whisker to keep watch .