yourself,--the cab we are looking for will have new glass in the
right-hand window." Thus Muller spoke to his companion as he put the
glove into his pocket and unfolded the tramway ticket. Amster understood
that they had found the starting point of the drive of the night before.

"I will go to all coupe stands," he said eagerly.

"Yes, but we may be able to find it quicker than that." Muller took the
little notebook, which he was now carrying in his pocket, and took from
it the tramway ticket which was in the cover. He compared it with the
one he had just found. They were both marked for the same hour of the
day and for the same ride.

"Did the man use them?" asked Amster. The detective nodded. "How can
they help us?"

"Somewhere on this stretch of the street railroad you will probably find
the stand of the cab we are looking for. The man who hired it evidently
arrived on the 6:30 train at the West Station--I have reason to believe
that he does not live here,--and then took the street car to this
corner. The last ticket is marked for yesterday. In the car he probably
made his plans to hire a cab. So you had better stay along the line of
the car tracks. You will find me in room seven, Police Headquarters,
at noon to-day. The authorities have already taken up the case. You may
have something to tell us then. Good luck to you."

Muller hurried on, after he had taken a quick breakfast in a little
cafe. He went at once to headquarters, made his report there and
then drove to Fellner's house. The latter was awaiting him with great
impatience. There the detective gathered much valuable information about
the first marriage of Asta Langen's long-dead father. It was old Berner
who could tell him the most about these long-vanished days.

When he reached his office at headquarters again, he found telegrams in
great number awaiting him. They were from all the hospitals and insane
asylums in the entire district. But in none of them had there been
a patient fitting the description of the vanished girl. Neither the
commissioner nor Muller was surprised at this negative result. They
were also not surprised at all that the other branches of the police
department had been able to discover so little about the disappearance
of the young lady. They were aware that they had to deal with a criminal
of great ability who would be careful not to fall into the usual slips
made by his kind.

There was no news from the cab either, although se