Nor did I relish it, as they Waited until Mrs. James and I had chosen a table, then moved o nand around an angle in the little alcove where I could not ■ee them, and even could scarce ly hear them. (V '“You seem worried,” observed lay companion, with a forced gaiety. “Perhaps,” I hazarded. “It has been a hard day and I can not put the Exchange out of my head. Let us forget it.” I ■laughed. “The Exchange?” she in quired shooting at me glance which I could not interpret. . Was It a Ruse? Did she really know who I was *nd that I was posing? or was she interested, lest for some rea son, I might recognize her? I passed the query off as easi ly as I could, finding that she was not disposed Toward confi dences. Nor did it take me long to note that she, too, was quite interested in the couple around the angle. Gradually it dawned on mo that she knew Kennedy, ■t least knew who he was. I tried to lead the conversation, but she refused to be led. Could It have been that she was plan ning some confidence to Ken nedy? I could see that my companion was getting more and more nerv ous and finally she leaned over to me and whispered over the flasses, “Why not cut out the luff? I know you and I know Professor Kennedy. Some time I want to see him—but I shall have to be careful. If I were you, I would get hi maway from here as soon as you can.” She seemed Rtartled at her own temerity. Before I could pursue the inquiry as to who she really was, she had excused her aelf, and almost ran from the room to rejoin a party at a game •f bridge which she had left. I sauntered over to Kennedy. Re was leaning forward over the table, pnring some story into the ear of Breshkaya. He did not ■ee me, but I watched him, won dering whether he thoughtf he was getting away with anything with this world-wide young per ■on? It seemed to me that we hud (one far enough for one night And, besides, there were ringing in my care the last words of “Mrs. James”—“Set him away M soon as you can. ” “Sorry,” I interrupted, affect ing the accept which I heard allx About me, as I broke in on them,' “But really, Harper, I must get back to the city tonight, or rath •r this morning.” I could see that secretly Bresh fcaya was furious at me, but Ken nedy rather welcomed the inter on. don’t know how we’re go ing to manage it,” ho considered. “Can we get a taxicab out here At this late hour?” Very Obliging. "We can get anything,” re tnred GBreslikaya, finding that it was useless to urge us to stay. “I’ll have Henry telephone for something that will get you back to the city—if you must 50. She smiled archly at Z Kennedy And laid her hand coaxingly on his, “Really I ’m afraid I must, he decided, pressing the little hand which she allowed to linger with an invitation. “Some other time we’ll have to come out again when we can make a night of it.” She smiled again through a pretty jmit, but Kennedy now Insisted, and a moment later the ■tiff butler was telephoning to Some local garage, which I had do doubt was like the one we had Visited, for a car. -It seemed to be an uncommon ly long time before there was any response, and it was fully an hour before we heard the sound af a motor outside. As we left the place we were accompanied to the door by Breahkaya and Mine. Rene who bowed ns out politely. Our cab had stopped not in front of the door, but farther up, dear the end of the house where the coach light was and the wait ing ears. We started over to ward it in the shadows. Suddenly we were confronted by a man in a heavy coat, who reeled at us, as though drunk. It was apparently one of the chauf feurs. The fellow was so ex tremely insolent that Kennedy could do nothing else than push bim roughly aside. Instantly the man turned on him, and from the shadows whence he had emerged, there rushed out two mare—be fore I knew it we were the cen ter of a brawl. But the method of attack had been quite sufficient to put us on guard in time. Both Kennedy and I had our automatics ready. At the same time a man who had just pulled in in a car dashed over toward us, though by this time we had had cowed the high binders who had evidently pulled off their attack prema turely. A Little Late. “ Kennedy 1" exclaimed a voice. I peered through the dimness. It was Ravenal who had come to the rescue, though a bit late. “I missed you all day,” he ex plained, “Then though of the Crystal Palace. There they told me you had gone with Bresh kaya, so I came out. What’s the matter! Didn’t they want you to go away!” Kennedy glanced at the house. Even in spite of the altercation in the yard no one inside seemed to have heard it, at least no one paid any attention. “I’ll take you back,” offered Ravenal. “I came out only to be sure that there wasn’t any trouble.” Kennedy strode over to the car that had been waiting, but it was driverless. Evidently the chauffeur had bee none of the at tackers. The attack had been premature, or else they had been surprised to find us armed. Kennedy was for tracing out the chauffeur, who had started the attack, but I learned over and whispered the parking words of Mrs. James.” He considered a moment, then turned to Ra venal. “I think I will take your of fer,” he decided. The young detective seemed quite flattered. “Got here just in the nick of time,” he mur mured ,as he started his engine, and we swung out of the shad owy grounds, without any furth er trouble. “It looks as though someone knew you were here, but didn’t want anything to hap pen in the house.” Kennedy said nothing. An Uneventful Bide. Our ride back to the city with Ravenal was uneventful and at that hour of teh nijj'ht we were able to make great time over the deserted roads. When we had crossed the bridge, instead of making Ravenal drive us all the way uptown. Kennedy thanked him and we climbed down into the subway, which whisked us up quicker than we could have been driven. It was late, and though we had not accomplished much by our trip out to the House of Mystery, still we were tired. To our surprise, however, as we approached our apartment, we could see a light burned there. At first we were inclined to approach it with caution, but on inquiry from the hallboy we learne dthat Jack Speed was up there and seemingly very wor ried. We hurried up and, sure enough there was the young man frantically excited. “Clare ha sdisappeared while you were away,” he announced as we entered. “I’ve exhausted every means I know of to trace here—and not a clue.” It was startling news and it left us quite up in the air as to what to do. As nearly as we could make out from Speed a stranger had come to Clare’s apartment very late in the night with a message | that Jack himself was out at the I House of Mystery at Heaton Hills, with Breshkaya. The mas sage itself was signed with the name “Minna Oakleigh.’’ Kennedy listened puzjzled. “Asa matter of fact we were out there wuh her,” he considered. ‘“'Who is Minnu Oakleigh?” Chapter 12 It is now a question of return ing to Rockcliff to make a final search. If Clare were up there, she must be in desperato need of help. Speed and I made hasty plant while Craig did his errand that took him up to the laboratory. First of all Speed wanted to have the car thoroughly looked over at his garage so that It would be in perfect condition and we might not have a break down at a critical time when we could not afford to have any thing wrong. At tha garage I noticed a new spot light on the side o the wind shield of Speed’s big car, and at my suggestion he had it taken off and transferred to the road ster. My idea had been that it might be useful if we had to do any night work. Finally Speed was satisfied that his car was alright and we jumped into it and started up town to pick up Craig. He was waiting for us impa tiently at the laboratory and in to the tool box on the rear of the car he jammed several things which he thought might be use ful in whatever emergencies might arise. Among them I no ticed one peculiarly shaped case and a smaller package on which he seemed to set great store. He placed them on top very care fully. Both Speed and I were too eager to be off to ask ques tions, and in a few moments we were away. OVER THE FERRY Across the ferry we started along the road taken by Bresh kaya earlier in the day, and we made jood time, for we wanted to get up there early, so that we might have daylight in order to prosecute our search. Every car that we saw loom ing in the distance returning to the city we scrutinized carefully in the hope that it might be Brcshkaya, but none of them proved to be her racer; perhaps it was just as well, for she might have sounded an alarm, I re flected. However, if we flattered our selves that we were going to have a safe and uneventful jour ney, we were reckoning without due regard to the Black Menace. We were bowling along at a great rate, and about to enter the part of the road that leads into the State reservation of the park of the Highlands, one of the most marvelous spots along the course of the lordly Hudson, when suddenly, from about a bend in the road, there loomed a hugs black limousine. The dri ver was hidden behind an extra ordinarily large pair of goggles so that his face was unrecogniz able and besides, his linen dust er of gray was pulled up con cealing the lower part of his face, There did not seem to be anyone in the body of the car. Speed himself was driving as this heavy car came tearing along tne road at a great pace, holding the center of the road with an utter of disregard of the rights of anyone else. Whether that was true of other cars which this concealed driver passed, I cannot say. But at least it hardly gave Speed a . chance. He pulled away sharp ly as the fellow forced him over to the right hand side of the road, and as he did so, the wheels ran off the road, skidded and threw the car plumb into a sand bank at the side of the road. A BLACK LIMOUSINE Before we knew what had hap pened, the black limousine was passed us, and as we looked back at it we could see a license plate on it, but its numbers were so battered that we were absolute ly unable to read them. Though we did not know it, it was part of a plot of the Black Menace to delay, possibly to wreck us. Only Speed’s clever ness and lightning like facility in handling a car avoided a worse accident. As it was, our roadster was damaged badly by the collision with the sand bank. The whole thing testified to the desperation with which the Black Menace was fighting back at us. It was a couple of hours be fore we could get anyone to tow us baok to the nearest garage, where we managed to make re pairs and proceeded on our way, the better part of the afternoon used, up by the delay. Dusk was approaching as we finally arrived in the region of the Highlands where we had last seen the car of Breshkaya sever al hours before. We passed the dirt crossroad, then came to the fork in the road, and turned down toward Rockcliff, follow ing the branch of the road that skirted the river. Kennedy had taken the wheel now, for he had determined upon a careful examination of the country. There was not a cross road that we did not turn down in the gathering darkness to ex plore. “Confound that limousine," he growled as the daylight faded and cut off our view of the sur rounding territory. “It was a long chance to take just for this, but it means putting us a day back in our search. Still Kennedy’s motto,had al ways been “it’s dogged as does it,’’ and he kept right on, fol ! lowing out every bit of cross road, especially those that led away toward the rive*1, *.or he had a fancy that it was in that direction that the racer off Breshltaya had gone when she had pulle.d awav from us. A USELESS SEARCH It seemed like a useless search and more than once I counselled giving it up, taking up our| headquarters for the night at} some quiet inn or road house and} starting out again at the first} streak of dawn. Kennedy would uot listen to it — yet. There was just one more road that he had not explored, which ran down from the main road by a steep and winding descent to the very shore of the river, going] down through a ravine or huge gully between the hills which rose on either side. He seemed determined to explore the road even in the darkness. Down it we crept, for it was narrow,, winding, and had a steep grade.] I wondered how we were everj going to get back, but Kennedy} paid no more attention to my objections than to say “well, wej can back up any hill, can t we? I At last he came to the end ofi the road, down by the river bank in the rift of hills. Once, per haps there may have been a pri vate ferry there but there was certainly nothing there now. Nor did it seem that there was evern a house in the neighborhod. Wq had passed no one, either in ve-j hicle or on foot. To all intents and purposes the place was aa wild as it had been in the days ofi the Half Moon, except for thei rough road itself. Certain it was we could go no further, unless the car would( float. Fortunately ther? was a, little open space hear the rivet] bank not vtri