"Some one else has ordered me. But I am not going to wait in this
cold, get in if you want to."

"All right. Now tell me first where you drove to last evening with
the sick lady and her companion?" The man looked astonished but
found his tongue again in a moment. "And who are you?" he asked
calmly.

"We will tell you that upstairs in the police station," answered
Muller equally calmly, and ordered the man to drive through the
gateway into the inner courtyard. He himself got into the wagon,
and in the course of the short drive he had made a discovery. He
had found a tiny glass stopper, such as is used in perfume bottles.
He could understand from this why the odour of perfume which had
now become familiar to him was still so strong inside the old cab.
Also why it was so strong on the delicate handkerchief. Asta Langen
had taken the stopper from the bottle in her pocket, so as to leave
a trail of odour behind her.




CHAPTER THREE

THE LONELY COTTAGE


Fifteen minutes after the driver had made his report to Commissioner
Von Mayringen, the latter with Amster entered another cab. A
well-armed policeman mounted the box of this second vehicle. "Follow