After breakfast Hal straightway got busy, and his skill and knowledge earned praise from George and Pepe. They volunteered to help, which offer Hal gratefully accepted. He had brought along a folding canvas tank, forceps, knives, scissors, several packages of preservatives, and tin boxes in which to pack small skins. His first task was to mix a salt solution in the canvas tank. This was for immersing skins. Then he made a paste of salt and alum, and after that a mixture of two-thirds glycerin and one-third water and carbolic acid, which was for preserving small skins and to keep them soft. And as he worked he gave George directions on how to proceed with the wildcat and squirrel skins. “Skin carefully and tack up the pelts fur side down. Scrape off all the fat and oil, but don’t scrape through. To-morrow when the skins are dry soak them in cold water till soft. Then take them out and squeeze dry. I’ll make a solution of three quarts water, one-half pint salt, and one ounce oil of vitriol. Put the skins in that for half an hour. Squeeze dry again, and hang in shade. That’ll tan the skin, and the moths will never hurt them.” When Hal came to take up the duck he was sorry that some of the beautiful plumage had been stained. “I want only a few water-fowl,” he said. “And particularly one of the big Muscovies. And you must keep the feathers from getting soiled.” It was interesting to watch Hal handle that specimen. First he took full measurements. Then, separating the feathers along the breast, he made an incision with a sharp knife, beginning high up on breast-bone and ending at tail. He exercised care so as not to cut through the abdomen. Raising the skin carefully along the cut as far as the muscles of the leg, he pushed out the knee joint and cut it off. Then he loosened the skin from the legs and the back, and bent the tail down to cut through the tail joint. Next he removed the skin from the body and cut off the wings at the shoulder joint. Then he proceeded down the neck, being careful not to pull or stretch the skin. Extreme care was necessary in cutting round the eyes. Then, when he had loosened the skin from the skull, he severed the head and cleaned out the skull. He coated all with the paste, filled the skull with cotton, and then immersed them in the glycerin bath. The skinning of the crocodile was an easy matter compared with that of the duck. Hal made an incision at the throat, cut along the middle of the abdomen all the way to the tip of the tail, and then cut the skin away all around the carcass. Then he set George and Pepe to scraping the skin, after which he immersed it in the tank.