Something that was like light itself flung into the air and down again with a splash. Bruce shouted then. He simply couldn't help it. And all the time there was a strange straining and travail in his brain, as if it were trying to give birth to a memory from long ago. He knew now what had made that glittering arc. Such a common thing,--it was singular that it should yield him such delight. It was a trout, leaping for an insect that had fallen on the waters. It was strange that he had such a sense of familiarity with trout. True, he had heard Barney Wegan tell of them. He had listened to many tales of the way they seized a fly, how the reel would spin, and how they would fight to absolute exhaustion before they would yield to the landing net. "The King among fish," Barney had called them. Yet the tales seemingly had meant little to him then. His interest in them had been superficial only; and they had seemed as distant and remote as the marsupials of Australia. But it wasn't this way now. He had a sense of long and close acquaintance, of an interest such as men have in their own townsmen. He went on, and the forest world opened before him. Once a flock of grouse--a hen and a dozen half-grown chickens--scurried away through the underbrush at the sound of his step. One instant, and he had a clear view of the entire covey. The next, and they had vanished like so many puffs of smoke. He had a delicious game of hide-and-seek with them through the coverts, but he was out-classed in every particular. He knew that the birds were all within forty feet of him, each of them pressed flat to the brown earth, but in this maze of light and shadow he could not detect their outline. Nature has been kind to the grouse family in the way of protective coloration. He had to give up the search and continue up the creek for further adventure. Once a pair of mallards winged by on a straight course above his head. Their sudden appearance rather surprised him. These beautiful game birds are usually habitants of the lower lakes and marshes, not rippling mountain streams. He didn't know that a certain number of these winged people nested every year along the Rogue River, far below, and made rapturous excursions up and down its tributaries. Mallards do not have to have aëroplanes to cover distance quickly. They are the very masters of the aërial lanes, and in all probability this pair had come forty miles already that morning. Where they would be at dark no man could guess. Their wings whistled down to him, and it seemed to him that the drake stretched down his bright green head for a better look. Then he spurted ahead, faster than ever.