Jill possessed in an unusual degree that instinct for exploration which is implanted in most of us. She was frankly inquisitive, and could never be two minutes in a strange room without making a tour of it and examining its books, pictures, and photographs. Almost at once she began to prowl.

The mantelpiece was her first objective. She always made for other people's mantelpieces, for there, more than anywhere else, is the character of a proprietor revealed. This mantelpiece was sprinkled with photographs, large, small, framed and unframed. In the center of it, standing all alone and looking curiously out of place among its large neighbors, was a little snapshot.

It was dark by the mantelpiece. Jill took the photograph, to the window, where the fading light could fall on it. Why, she could not have said, but the thing interested her. There was mystery about it. It seemed in itself so insignificant to have the place of honor.

The snapshot had evidently been taken by an amateur, but it was one of those lucky successes which happen at rare intervals to amateur photographers to encourage them to proceed with their hobby. It showed a small girl in a white dress cut short above slim, black legs, standing in the porch of an old house, one hand swinging a sunbonnet, the other patting an Irish terrier which had planted its front paws against her waist and was looking up into her face with that grave melancholy characteristic of Irish terriers. The sunlight was evidently strong, for the child's face was puckered in a twisted though engaging grin. Jill's first thought was "What a jolly kid!" And then, with a leaping of the heart that seemed to send something big and choking into her throat, she saw that it was a photograph of herself.

With a swooping bound memory raced back over the years. She could feel the hot sun on her face, hear the anxious voice of Freddie Rooke—then fourteen and for the first time the owner of a camera—imploring her to stand just like that because he wouldn't be half a minute only some rotten thing had stuck or something. Then the sharp click, the doubtful assurance of Freddie that he thought it was all right if he hadn't forgotten to shift the film (in which case she might expect to appear in combination with a cow which he had snapped on his way to the house), and the relieved disappearance of Pat, the terrier, who didn't understand photography. How many years ago had that been? She could not remember. But Freddie had grown to long-legged manhood, she to an age of discretion and full-length frocks, Pat had died, the old house was inhabited by strangers … and here was the silent record of that sun-lit afternoon, three thousand miles away from the English garden in which it had come into existence.

The shadows deepened. The top of the great building swayed gently, causing the pendulum of the grandfather-clock to knock against the sides of its wooden case. Jill started. The noise, coming after the dead silence, frightened her till she realized what it was. She had a nervous feeling of not being alone. It was as if the shadows held goblins that peered out at the intruder. She darted to the mantelpiece and replaced the photograph. She felt like some heroine of a fairy-story meddling with the contents of the giant's castle. Soon there would come the sound of a great footstep, thud—thud …

Thud.

Jill's heart gave another leap. She was perfectly sure she had heard a sound. It had been just like the banging of a door. She braced herself, listening, every muscle tense. And then, cleaving the stillness, came a voice from down the passage—

For an instant Jill could not have said whether she was relieved or more frightened than ever. True, that numbing sense of the uncanny had ceased to grip her, for Reason told her that spectres do not sing rag-time songs. On the other hand, owners of apartments do, and she would almost as readily have faced a spectre as the owner of this apartment. Dizzily, she wandered how in the world she was to explain her presence. Suppose he turned out to be some awful, choleric person who would listen to no explanations.

Very near now. Almost at the door.

A dim, shapeless figure in the black of the doorway, scrabbling of fingers on the wall.

"Where are you, dammit?" said the voice, apparently addressing the electric-light switch.

Jill shrank back, desperate fingers pressing deep into the back of an arm-chair. Light flashed from the wall at her side. And there, in the doorway, stood Wally Mason in his shirt-sleeves.