After lunch they went again to call on the Martins, as Mr. Bobbsey had to see the father of Billy and Nell on business.
"And where are we going to have some fun?" Bert asked, as they journeyed away from their hotel toward the Martin house.
"You'll see," his father promised. The children tried to guess what it might be, but they could not be sure of anything.
It did not take Mr. Bobbsey long to get through with his business with Mr. Martin and then the father of the twins said to Mrs. Martin:
"Can you let Billy and Nell come with us on a little trip?"
"To be sure. But where are you going?" Mrs. Martin replied.
"I thought we'd take one of the big sight-seeing autos and ride about the city, and perhaps outside a little way," said Mr. Bobbsey. "Nell and Billy can tell us the best way to go."
"Oh, yes! I can do that!" cried Billy. "I often take rides that way with my uncle when he comes to Washington. Come on, Nell! We'll get ready."
