Uncle Will looked the ground over carefully. Below Union Gulch was a level expanse of gravel ten feet higher than the stream and covered with snow except along the edge of the bank. This gravel rested upon solid rock at about the level of the water. He took the gold-pan and set out, with Mr. Bradford, the recorder, and King, on a tour of investigation, bidding the boys cut stakes similar to those on the discovery claim. David and Roly would have preferred to go with their elders, but being accustomed to obey orders without question they set off at once on the less romantic quest for straight young poplars. Occasionally, however, they paused to watch the gold-seekers down the valley. [Illustration: "Presently some little yellow specks were uncovered"] The stakes having been cut and trimmed, the boys brought them all down to the discovery claim. They were four in number, sufficient for three adjoining claims. "What luck, Uncle Will?" shouted Roly, as they ran to join the others. "Plenty of colors," answered that gentleman, smiling. "I've no doubt I could get more if I had brought a shovel. The gravel is frozen so hard that I can't scrape much together." "What are colors?" asked David. "Colors," explained his uncle, "are little thin flakes of gold, as distinguished from heavier pieces called grains or nuggets. Look in the pan here, and you'll see what colors are." In the bottom of the pan lay a small quantity of dark sand, which Uncle Will told them was called "black sand" and consisted mainly of iron. Dipping up a little water, he allowed it to wash back and forth over the black sand, and presently some little yellow specks were uncovered. These were the colors of gold, which, being relatively heavier than even the iron, had sifted down to the very bottom. "Hurrah!" cried Roly, joyfully, as he caught sight of them, adding with more force than elegance, "that's the stuff!" David, maturer and less boisterous, was not a whit less pleased. He expressed a desire to see how the panning was done. Uncle Will accordingly drew on his rubber gloves to protect his hands from the icy water, rinsed out the pan, and with some difficulty scraped together with the head of an axe a panful of dirt and gravel from the bank as near bed-rock as possible, explaining that the most gold was found as a rule at the lowest possible point. He carried the gravel to the edge of the stream, where he allowed the water to flow in, not too swiftly, upon it. He now rinsed off and threw out the larger stones, after which he took the pan in both hands and shook it vigorously for a few seconds with a circular motion, finally letting the water flow rapidly out, carrying with it some lighter portions of earth and gravel. Then with his hands he pushed out of the pan the upper part of its contents to the depth of about half an inch. Roly was alarmed at once. "Look out, Uncle," said he. "You'll lose some of the gold, won't you?"