As he drove now along the lonely white road, his thoughts chiefly centred themselves upon Margaret, his beautiful sister Margaret, who, in spite of her sins and follies, as he considered them to be, had always held a place in her brother's heart. He gave her the place grudgingly; he would have gone to the stake rather than confess that her beauty made, or ever had made, any appeal to him. And yet, as he was driven quickly onwards under the lowering skies, it was his sister's beautiful face that rose persistently before him, her face, as he had last seen it, when she was a radiant girl, in the glory of her happy girlhood. It was odd; it was even annoying to him that just this particular vision out of the past should fill his mind now, but for once in his grim and well-disciplined life, he was unable to drive away the haunting vision. The garden of the old house made the setting of the picture--the garden that was now his own, and the sunk lawn, with the sun-dial amongst the rose-trees, that had been his father's pride. Margaret had stood beside the sun-dial, on that far-off June day, her fingers lightly tracing the motto that ran round the dial's face, her laughing eyes lifted to her brother. "Ah! but you don't believe in the motto, you see." The words came echoing back to him across the years, until he almost felt as though he could actually hear the low voice again, and Margaret's voice had always had such unspeakable charm. "You think a motto like this just silly and sentimental, don't you, Arthur?" And once more her fingers had traced the faint lettering, whilst she slowly read the words aloud. "_Per incertas, certa amor_." (Through uncertainty, certain is love.) "I mean that to be my motto, as well as the motto of the sun-dial"; just a tiny ring of defiance seemed to creep into her voice with the last words; Sir Arthur remembered it even now, and he had answered her gravely, out of the depths of his convictions. He had spoken with solemnity, of duty, as higher than love; and she had laughed again, her deep soft laugh, though the look in her eyes had belied her laughter. "Love is the greatest thing in the world," she had said, very slowly, very quietly, but the words rang with the sureness of a great certainty. "Love is the only thing that matters in all the world, because to love properly is to be perfect. Duty, right, goodness, they all follow upon love--real love. Love is the greatest thing in the world. Through all uncertainty--love is--sure."