He saw her at last and walked quickly towards her.

As he approached her, she turned about and with an almost imperceptible beckoning gesture walked away.

He followed her along the Bayswater Road and gradually drew level.
"I am afraid I have been watched," she said in a low voice.

"Will you call a cab ?" He hailed a passing taxi, helped her in and gave at random the first place that suggested itself to him, which was Finsbury Park.
"I am very worried," she said, "and I don't know anybody who can help me except you." "Is it money ?" he asked.
"Money," she said scornfully, "of course it isn't money.

I want to show you a letter," she said after a while.
She took it from her bag and gave it to him and he struck a match and read it with difficulty.
It was written in a studiously uneducated hand.
"Dear Miss, "I know who you are.