So I worked carefully into position to cast to the trout at the tail of the pool. This was thin, clear water. If I didn't make the first cast almost perfect, I might flush the trout. I'd have to cast with the rod held out to the side, horizontal with the water, so that the fish would not spot the false-casting. I took my time, made the sidearm false-casts well away from the fish and dropped the fly three feet above him. It went over him drag-free. He rose and took, and I was into him. Though I was using a 5X tippet with a breaking point of 3.3 pounds, I put on all the pressure I dared to keep the trout from running up into the pool and scaring the two other fish. It worked. He turned and raced down my way. I finally landed him just below where I had stood to cast. I released the trout and quietly waded a bit farther up the pool. I was zeroing in on that riser near the raft of moss. When I got to what I figured was the right spot to cast from, I stood still three or four minutes, just in case the fish had become suspicious.