"You must be a little more careful when you're playing where Flossie and Freddie are. They are younger than you, and don't so well know how to look out for themselves. You must look out for them. But now I want you to go down to daddy's office."
"What do you want us to do?" asked Nan.
"Here is a letter that he ought to have right away," went on Mrs. Bobbsey. "It came to the house by mistake. It should have gone to daddy's lumber office, but the postman left it while I was out, and Dinah was out in the barn with you children, so she could not tell him to carry it on down town. So I wish you'd take it to daddy. He has been expecting it for some time. It's about some business, and I don't want to open the letter and telephone what's in it. But if you two will just run down with it———"
"Of course we will!" cried Bert. "It'll be fun!"
"And may we stay a little while?" asked Nan.
"Yes, if you don't bother daddy. Here is the letter."
