"There it is again!" screamed Flossie. "Oh, mamma, mamma, come in my room quick!"
Sandy grabbed hold of Freddie.
"We"re all right," whispered the brave little Freddie. "It"s only the girls that"s hollering."
Then they both put their curls under the bedquilts.
"Someone"s playing the piano," Bert said to Harry; and, sure enough, a nocturnal solo was coming up in queer chunks from the parlor.
"It"s a crazy burglar, and he never saw a piano before," Flossie said.
The hall clock just struck midnight. That seemed to make everybody more frightened.
Uncle Daniel was hurrying down the stairs now.
"There it is again," whispered Bert, as another group of wild chords came from the piano.
"It must be cats!" exclaimed Uncle Daniel. "Harry, come down here and help light up, and we"ll solve this mystery."
Without a moment"s hesitation Bert and Harry were down the stairs and had the hall light burning as quickly as a good match could be struck.
But there was no more music and no cats about.
"Where is Snoop?" asked Uncle Daniel.
The boys opened the hall door into the cellarway, and found there Snoop on his cushion and Fluffy on hers.
"It wasn"t the cats," they declared.
"What could it be?"
Uncle Daniel even lighted the piano lamp, which gave a strong light, but there didn"t seem to be any disturbance about.
"It certainly was the piano," he said, much puzzled.
"And sounded like a cat serenade," ventured Harry.
"Well, she isn"t around here," laughed Uncle Daniel, "and we never heard of a ghost in Meadow Brook before."
All this time the people upstairs waited anxiously. Flossie held Nan so tightly about the neck that the elder sister could hardly breathe.
Freddie and Sandy were still under the bedclothes, while Mrs. Bobbsey and Aunt Sarah listened in the hall.
"Dat sure is a ghost," whispered Dinah to Martha in the hall above.
"Ghosts always lub music," and her funny big eyes rolled around in that queer way colored people have of expressing themselves.
"Ghosts nothin"," replied Martha indignantly. "I dusted every key of the piano to-day, and I guess I could smell a ghost about as quick as anybody."
"Well, I don"t see that we can do any good by sitting around here,"
remarked Uncle Dan to the boys, after the lapse of some minutes. "We may as well put out the lights and get into bed again."
"But I cannot see what it could be!" Mrs. Bobbsey insisted, as they all prepared to retire again.
"Neither can we!" agreed Uncle Daniel. "Maybe our piano has one of those self-playing tricks, and somebody wound it up by accident."
But no sooner were the lights out and the house quiet than the piano started again.
"Hush! keep quiet!" whispered Uncle Daniel. "I"ll get it this time, whatever it is!"
With matches in one hand and a candle in the other he started downstairs in the dark without making a sound, while the piano kept on playing in "chunks" as Harry said, same as it did before.
Once in the parlor Uncle Daniel struck a match and put it to the candle, and then the music ceased.
"There he is!" he called, and Flossie thought she surely would die.
Slam! went the music-book at something, and Sandy almost choked with fear.
Bang! went something else, that brought Bert and Harry downstairs to help catch the burglar.
"There he is in the corner!" called Uncle Daniel to the boys, and then began such a slam banging time that the people upstairs were in terror that the burglar would kill Harry and Bert and Uncle Daniel.
"We"ve got him" We"ve got him!" declared Harry, while Bert lighted the lamp.
"Is he dead?" screamed Aunt Sarah from the stairs.
"As a door-nail!" answered Harry.
"What is it?" asked Mrs. Bobbsey, hardly able to speak.
"A big gray rat," replied Uncle Daniel, and everybody had a good laugh.
"I thought it might be that," said Mrs. Bobbsey.
"So did I," declared Nan. "But I wasn"t sure."
"I thought it was a big black burglar," Flossie said, her voice still shaking from the fright.
"I thought it was a policeman," faltered Sandy. ""Cause they always bang things like that."
"And I thought, sure"s yo" life, it was a real ghost," laughed Dinah.
""Cause de clock jest struck fer de ghost hour. Ha! ha! dat was suah a musicanious rat."
"He must have come in from the fields where John has been plowing. Like a cat in a strange garret, he didn"t know what to do in a parlor," said Uncle Daniel.
Harry took the candle and looked carefully over the keys.
"Why, there"s something like seeds on the keys!" he said.
"Oh, I have it!" exclaimed Bert. "Nan left her hat on the piano last night, and it has those funny straw flowers on it. See, the rat got some of them off and they dropped on the keys."
"And the other time he came for the cake," said Aunt Sarah.