Naturally she was somewhat taken aback. "What do you mean?" she asked.

"Don't look so surprised," I said, smiling still. "There's a man watching me. He mustn't know. It's terribly important—a question of a life, maybe."

I was lucky in my girl. She had an adventurous spirit. She smiled back. "Who to?" she asked.

"Have you got a good memory?"

"First-rate."

"Miss Farrell, care Doctor ——'s Sanatorium, Amityville."

"I have it."

"Just say: 'Do not leave the house to-night.'"

"Right. Signature?"

"'B. Enderby.' You'll find the money to pay for it on the seat when I get up."