An automobile was standing at the bridge when I got there and I cursed the whim that had sent me to the club on a false scent and kept me from having an uninterrupted search for the weapon. When I saw, however, that the driver of the automobile was Inspector Robinson, I was greatly relieved, for this would not only give me a chance to learn what he had discovered concerning the men in the black limousine, but would not interfere with the search for Jim's gun. Robinson had his coat off and his sleeves rolled up and was fishing around the edge of the little creek with his hands. So engrossed was he in his task that I was almost upon him before he looked up. "Good afternoon, Inspector," I addressed him. "What are you doing, digging for gold or making mud pies?" "I'm gettin' bait to catch a sucker," he snarled. "You must have thought you had one this morning." "What do you mean?" I asked. "All that bunk you handed me about Schreiber and the men in the black limousine. That was a fine stall you pulled. I might have known you was tryin' to cover up somebody's tracks." He dried his hands on a rather flamboyant, yellow handkerchief. "I haven't the least idea what you are talking about," I replied coldly. "Oh, you haven't, haven't you?" the little man burst out malignantly. "You're innocent, you are! Too damned innocent! I suppose you didn't know that your brother-in-law was shot in the back of the head and that your sister was the only one that was with him when it was done. I suppose that's news--eh?" My heart stood still as I heard his words. So he was after the proof that Helen did it. He had read the insinuations in _The Sun_ and had abandoned his work against Schreiber and Zalnitch for the fresher trail. "I found out this morning that my brother-in-law was shot, but that only makes the case look the blacker for those who openly threatened his life." "Among whom was your beautiful sister," the detective retorted acidly. "How do you know that?" I demanded. "From her maid and all the rest of the servants in the house. I found that out when I went up to take another squint at the automobile. You thought you were pretty smart sendin' me on a wild-goose chase after a couple of cracked Socialists, when all the time you knew it was your own sister done the thing. Tried to keep me off the track by slippin' me a little dough. Well, it didn't work, see? There's your dough back." He threw a crumpled wad of bills on the ground at my feet. "No one saw you give it to me, but I ain't takin' any chances, you may have marked those bills. From now on I work alone without any theories from you."