him. At last Danny reached the back fence. There was a gate there, but this was kept locked by Sam, so that tramps might be kept out.
For the moment Danny did not know what to do. Then he caught hold of the top of the fence and tried to scramble over. But there was a sharp nail there and on this his jacket caught.
"I've got you now!" exclaimed Bert, and made a clutch for him. But there followed the sound of ripping cloth and Danny disappeared into the darkness, wearing a jacket that had a big hole torn in it.
"Was it really Danny?" questioned Nan, when Bert came back to the front piazza.
"Yes, and he tore his coat—I heard it rip."
"What do you think of that?"
Nan pointed to an object on the piazza, half under the door mat. There lay a dead rat, and around its neck was a string to which was attached a card reading, "Nan and Bert Bobbsey's Ghost."
"This is certainly awful," said Bert.
The noise on the piazza had brought Mrs. Bobbsey to the door. At the sight of the dead
