"I sent out two more than I received," said Bert.
"Never mind, Bert; boys don't expect so many as girls," answered Nan.
"I'd like to know who sent that mean thing that was marked ghost," went on her twin brother.
"It must have come from Danny Rugg," said Bert, and he was right. It had come from Danny, but Nan never let him know that she had received it, so his hoped-for fun over it was spoilt.
In the evening there was more fun than ever. All of the children went out and dropped valentines on the front piazzas of their friends' houses. As soon as a valentine was dropped the door bell would be given a sharp ring, and then everybody would run and hide and watch to see who came to the door.
When the Bobbsey children went home they saw somebody on their own front piazza. It was a boy and he was on his knees, placing something under the door mat.
"I really believe it is Danny Rugg!" cried Nan.
"Wait, I'll go and catch him," said Bert, and started forward.
But Danny saw him coming, and leaping over the side rail of the piazza, he ran to the back garden.
"Stop," called Bert. "I know you, Danny Rugg!"