Yes, I remembered the address, for I had seen it only the day before, so
I told the cabman to drive to —— Street, Chelsea.

I was right. There on the door was the name of the man I had hoped to find—Professor Von Virchow. I paid the cabman, and knocked at the door with a beating heart.

A sallow-faced girl opened the door, and asked my business.

Was Professor Virchow at home?

Yes, he was at home, but would be engaged for the next quarter of an hour; after that, he could see me on business connected with his profession.

I was accordingly ushered into a musty room, which sadly wanted light and air. The quarter of an hour dragged slowly away, when the sallow-faced girl again appeared, saying that Professor Von Virchow would be pleased to see me.

I followed her into an apartment that was fitted up like a doctor's consulting-room. Here I found the man I had come to see.

He was a little man, about five feet four inches high. He had, however, a big head, a prominent forehead, and keen grey eyes. He wore gold-rimmed spectacles, and was evidently well fed and on good terms with himself.

"You are a professor of mesmerism and clairvoyance, I believe?" I began.

"That is my profession," said the little man, "Then I am in hopes that you may be able to help me in my difficulty."