"One can never tell who may sneak quietly up the stair.

I am surrounded by spies trying to find out what I am doing." "Wait a moment," said Jennie.
She went quickly to the outer door, found that it closed with a spring latch, opened and shut it two or three times until she was perfectly familiar with its workings, then she closed it, drew the inner door nearly shut, and sat down.
"There," she said, "we are quite safe from interruption, Professor Seigfried; but I must request you not to move from your chair." "I have no intention of doing so," murmured the old man.

"Who sent you?
You said you would tell me.

I think you owe me an explanation." "I think you owe me one," replied the girl.

"As I told you before, no one sent me.