It was quite dusk when he got back to Sandbeach. Half an hour later and he would probably have failed to see a small white package lying on the path-way. He was in a narrow side street leading from the esplanade to the railway station. As it was, he not only saw it, but took the trouble to stop and pick it up. It proved to be a somewhat bulky letter addressed to Jeremiah Trall, Esq., 49, Poplar Street, Soho, London. Mallow's instinct as soon as he read this was to drop it. But the tall figure of a woman coming quickly round the corner arrested his attention. He saw that she was eagerly searching for something. She came up to him. "My letter sir," she ejaculated hurriedly. "I dropped it. Thank you." She snatched it from him, and before he had time to recover himself she was gone. "Clara Trall!" he gasped, thunderstruck. "Shall I follow her? No, I have no right to do that. Yet the address of that letter is the address of Dr. Drabble in London. More mystery--more scheming. What on earth can it mean?" But it was many a long day before Mallow found an answer to that question. CHAPTER IV. "MORE MYSTERY." For various reasons, Mallow had not taken up his abode in the same hotel as Olive. He had found a clean, unpretentious, little place near the station, which suited him well enough in his present mood. Here he ate a solitary dinner, cooked and served in thoroughly English style. Invariably fastidious over his food, Laurence was not now inclined to be any more particular about it than he was about his lodging. He ate but little. A good cigar and some strong black coffee, he felt, would do more for him just now than any food. He inquired from the waiter how the trains ran to London, for he had no doubt that on the morrow it would be necessary for him to use them. Curiously enough the waiter knew all about the trains, notwithstanding the fact that he was an aboriginal as well as a waiter. "On'y two decent ones from 'ere to Lunnon," said this Ganymede; "you'll see 'em, sir, in the time-tables. There's one leaves ten 'o the mornin', an' another at six at night. You gits to Lunnon in about three hours; so, yer see, they ain't express like even then." "Ten in the morning," mused Mallow. "Ah! that's a trifle too early. I may as well have another day with Olive, to cheer her up. The evening train will suit me. I can see Drabble in Soho the next morning--that is, if he is in town." Mallow finished his coffee and cigar. Then he lit a fresh one, slipped on his coat--for the night was chilly--and strolled round to the big hotel. He was shown at once to Mrs. Carson's sitting-room. He found her almost as much agitated as she had been when he left her. "Oh, Laurence!" she said, calling him by his Christian name in her excitement. "How glad I am that you have come. She has gone!" "She has gone? Who has gone?" asked Laurence, pausing in the act of removing his coat.