"Yes, I think I had better," answered Mr. Bobbsey. "He did me a great favor, caring for Flossie and Freddie, and I must do what I can for him. He says it will make his mind easier if he can talk to me before the doctors try to make him well in the hospital."
"Then we can't go to the Natural History Museum to-day!" exclaimed Nan.
"Oh, yes; your mother can take you."
"I fear I can't tell you, as well as Daddy can, about the different things," said Mrs. Bobbsey, smiling; "but I'll do the best I can."
"Oh, Momsey! Of course we love to have you!" cried Nan, kissing her mother.
"I know, but you want Daddy, too! I don't blame you. But we must give him up for a little while, if it is to help Uncle Jack."
"Oh, of course we will!" cried Nan, and Bert nodded his head to show that he agreed.
"I'll just about have time to catch a train for Lakeport," said Mr. Bobbsey, looking at his watch. "Where are Flossie and Freddie? I want to say good-bye to them."
"They are playing with Laddie," said Mrs. Bobbsey. "I'll get them."
The two younger Bobbsey twins felt sorry that their father had to go away, but they were told he would soon be back again. But as Flossie and Freddie were having such fun playing with Laddie, they did not really think much about Mr. Bobbsey going away, except for five minutes or so.