"Which is the best plan, after all," said Chester.
An hour's walk brought them to the embassy building.
"The first thing," said Hal, "is to find out if Robard is in."
"And how are you going to do that?" asked Uncle John.
"Simple," replied Hal. "I'll go up and ask."
He approached the door and rang the bell. A servant opened the door.
"Is Herr Robard in?" asked Hal in perfect German.
The man shook his head.
"I have an important message for him," said Hal. "When shall I find him in?"
The servant glanced at him sharply, then leaned close.