The Great Secret by E. Phillips Oppenheim

"Mr. Courage!"

I looked up quickly. She was within a few feet of me, although I had not heard even the rustling of her gown. The dog, with his apple-green bow now put to rights, was sitting upon her shoulder. By the side of his uncanny features, it seemed to me that I had never sufficiently appreciated the fresh girlishness, the almost ingenuous beauty of her own face. She wore a plain, white, linen gown, and a magnificent blossom of scarlet geraniums in her bosom.