The Valley of Ghosts by Edgar Wallace

Stella Nelson left the post office in a panic. Though she did not turn her head, she was conscious that the good-looking, strong-faced man she had seen in the telephone box was looking after her. What would he think, he, a man to whom, in all probability, the flicker of an eyelash had significance? She had nearly swooned at the shock of that word 'detective', and he had seen her sway and turn pale, and must have wondered what was the cause.

She wanted to run, and it required all her reserve of will to keep her from increasing her already hurried pace. She went rapidly down the declivity to the railway station and found she had half an hour to wait, and only then remembered that when she had left the house she had given herself time to order a number of commodities that were required for the kitchen. Should she go back? Dare she face the grave scrutiny which had so terrified her?