"And her disappearance a serious matter for you, I realize. I can't imagine that she and this singular box can have been taken into any of our warehouses." "You have perfect confidence in Volckman?" "Always have had. Would you like to question him? I will send for him if you wish." "No; I think not. I certainly do suspect the man of being mixed up in this business, but it will do no good to make him aware of it; still I should like to be given the opportunity to search these warehouses in every part." "And so you shall. I will go with you myself. If there is any crooked work going on here I want to know it." The search was made accordingly, but nothing came of it. "Listen, Mr. Renshaw," said the old detective as they were about to part. "To-day a laboring man will apply for work at this office. He wants to be hired and given a job, which will enable him to watch Volckman." "I understand," was the reply, "and so it shall be." And so it was. Secret Service man Leggett, an excellent detective in his way, was the person selected, but three days passed, and at the end of that time he had nothing to report. Nor had a word been heard of Alice. This time her disappearance seemed to be a serious matter. The Bradys exhausted every effort to find her, but in vain. CHAPTER III. LUNG & LUNG. It is needless to dwell upon the anxiety of the Bradys over the strange vanishing of their accomplished partner. They were otherwise very seriously inconvenienced. The Secret Service people, satisfied with the very valuable haul the detectives had made in the line of smuggled opium, now called them off. The Bradys are not regular Secret Service men. They have, however, an arrangement with the Government under which their services can be claimed at any time. The day after Alice's disappearance Old King Brady was notified by Mr. Narraway that the regular force would finish up the matter, inasmuch as he felt satisfied that the heavy loss they had sustained must have bankrupted the smugglers. Thus under ordinary circumstances the detectives would have made haste to cross the continent and get back to their own business in New York. As it was, they had no idea of leaving San Francisco yet awhile, of course. Each day was devoted to the search for Alice. Even the police took a hand in the game, much as Old King Brady dislikes to have them mix up in his affairs, but as we have said before, it was all in vain. On the morning of the fourth day before the Bradys had yet left the hotel, a page announced that a Chinaman wished to speak to the old detective, and at the same time he handed in a business card printed in English on one side, and in Chinese on the other. The English side read thus: LUNG & LUNG, GENERAL IMPORTERS, 1015 Dupont Street, San Francisco, Cal. Ah Lung Gee Lung Wun Lung. "The whole Lung family," remarked the old detective, looking at the card. "Show the man up." It proved to be Ah Lung who came.