No sign of astonishment appeared on Emil’s phlegmatic face.

He went slowly downstairs. The Frau Professor and Anna left the door open and listened. Presently they heard Emil come up again, and they called him.

“Was anyone there?” asked the Frau Professor.

“Yes, Herr Sung was there.”

“Was he alone?”

The beginning of a cunning smile narrowed his mouth.

“No, Fraulein Cacilie was there.”

“Oh, it’s disgraceful,” cried the Frau Professor.

Now he smiled broadly.

“Fraulein Cacilie is there every evening. She spends hours at a time there.”