"This is extraordinary, young man!" exclaimed the officer of the police, for such the man was. "I think you had better explain."
"I am in a great hurry, sir," pleaded Dave.
"He wants to catch his father before the expedition leaves Christiania," put in Roger.
"Yes."
The police official drew up his shoulders and made a wry face.
"Has it left already?" questioned Dave, eagerly.
"To be sure—four days ago," was the answer, which filled Dave's heart with fresh dismay.