"Oh, I am all right, thank you," said Patricia with a bright smile, and passed along. All the same she now began to feel uncomfortable, and to realize that Hyde Park on a foggy November night was not exactly the place for a young lady. Only the desire to earn the coveted five pounds nerved her to do that which she had agreed to do.

Crook Street is not far from the main entrance to the Park on the Bayswater side, and, as the fog grew thin further on, Patricia found herself speedily on the broad path which leads directly to the Serpentine bridge. She knew this portion of the Park extremely well, as, having much time on her hands, she frequently wandered about the grassy spaces on idle afternoons. There were few people about, as the night was so disagreeable, and those she saw moved swiftly past her. Occasionally she caught a glimpse of vague forms under the trees: but she never looked closely at these night-prowlers, but, keeping in the middle of the path, moved steadily to her destination. At last she came to the bridge and took up her station at the right-hand corner on this near side. Having come to the end of her journey she lighted the lantern.

Across the water the broad bridge stretched weirdly, vanishing into the fog, which here grew denser, like the Bridge of Life in the Vision of Mirza. Patricia had read Addison's fantastic story in some school-book, and it was suggested to her again by the sight before her. People came out of the mist and disappeared into it again: some passed, unconscious of the quiet figure at the corner, while others peered into her face. But no one addressed her, much to her relief, and the ruddy light of her lantern shone like an angry star. Then the expected happened in one moment and quite without preparation.

A man came swiftly over the bridge--so swiftly, that it might have been said that he was running. She had no time to see what he was like in looks, or how he was dressed, before he caught sight of the red light and stopped for one moment to thrust a small box into her hand. Then he darted away to the left and disappeared along the bank on the Bayswater side. That was all!

[CHAPTER II]

WHAT HAPPENED

For some moments Patricia stood still, with the box in her hand, and stared into the gloomy fog, behind which the man was retreating. Another man passed her swiftly, as if in pursuit of the first, but halted for one single moment to look at her. She was an indistinct figure in the misty air, but she could feel that his eyes were piercing her through and through. A few seconds later and he disappeared also, but whither he went she could not tell. The whole oddity of the episode startled her, although much that had taken place had been anticipated and described by Mrs. Pentreddle.

As the name flashed across Miss Carrol's brain, she remembered that she had yet to complete her mission by taking back the box to the old lady. Almost mechanically, and with the lantern still burning, she began to retrace her steps in the direction of Bayswater. The fog was growing denser, but by her knowledge of the path and the feel of the hard gravel under her feet, she was enabled to avoid getting lost. A sudden sense of weariness, which no doubt came from the slackening of her nervous tension, overcame her, and she was glad to sink down on the first bench she came to. This was near a gas-lamp, and in the blurred circle of light she felt safe from the attentions of any night-bird. Then a strange thing happened.

It was a sensation and nothing more: one connected with the small box she held so tightly clasped in her hand. As she gripped it, she felt--with her sixth sense, no doubt--that waves of force were radiating from its interior. Patricia's body being Celtic, was strung with extraordinarily delicate nerves, and by these she was made aware of many influences which passed by less highly organized mortals. Nine human beings out of ten would not have felt the radiating influence of whatever was contained in the box, but she did. And as wave after wave extended outward, she felt as though some invisible force was driving back invisible evil. The nervous fears she had hitherto felt--and no wonder, considering the hour and the place and the mission--vanished entirely, and she smiled to think that anything could ever have frightened her. A warm light, felt rather than seen, seemed to envelop her, and within its charmed circle no evil could come. Had a robber attacked her, had an earthquake happened, had a storm of thunder and lightning devastated the air, she would not have felt the least fear. The regular waves of this strange force passed ever outward, repelling all harm, all fear; her body thrilled to the pulsations. It was as though some unseen being was draping her in his mantle of power.

Naturally she connected these weird manifestations with the box, and that with Mrs. Pentreddle. How came it, she asked herself, that so commonplace a woman should be connected with so extraordinary an object? And then she recollected that she had not set eyes on the object, whatever it might be; yet to do so she had only to look into the box. Opening the shutter of the lantern in which the glass was set, so that she could see by the natural light and not by the red glare, she examined the box. It was a common deal case, very small and very roughly made, with the lid held down by a thin wire. In fact, it was only one of those boxes furnished by shopkeepers to customers, so that delicate goods--china, glass, and such-like--might be carried away without danger of breakage; it was not even swathed in paper or bound with string. It seemed strange that if what the box contained were valuable or dangerous more precautions had not been taken in rendering its contents safe. Then, again, the man who had delivered it in so odd a way had been overcome with fear. Patricia guessed that when she remembered his laboured breathing, the backward glance he had thrown over his shoulder, and the hurried way in which he had made off, after thrusting the box into her hand. Finally, there was no doubt that the other man, who had halted for the moment, was in pursuit. Patricia looked up when she arrived at this point of her meditations, but could see no one, although she heard some footsteps dying away and others approaching on the hard gravel. And all the time she was considering things, the waves of power still continued to radiate. As they had banished her fears, they had also stimulated her limbs, and she no longer felt weary. This being the case, she half rose to return to The Home of Art, since there was no longer any reason for delay.