But there is a law in all shooting--to be expert, you must practise continually--and when Rolf saw his host shoot nearly every day at some mark, he tried to join in the sport. It took not many trys to show that the bow was far too strong for him to use, and Quonab was persuaded at length to make an outfit for his visitor. From the dry store hole under the rock, he produced a piece of common red cedar. Some use hickory; it is less liable to break and will stand more abuse, but it has not the sharp, clean action of cedar. The latter will send the arrow much farther, and so swiftly does it leave the string that it baffles the eye. But the cedar bow must be cared for like a delicate machine; overstring it, and it breaks; twang it without an arrow, and it sunders the cords; scratch it, and it may splinter; wet it, and it is dead; let it lie on the ground, even, and it is weakened. But guard it and it will serve you as a matchless servant, and as can no other timber in these woods. Just where the red heart and the white sap woods join is the bowman's choice. A piece that reached from Rolf's chin to the ground was shaved down till it was flat on the white side and round on the red side, tapering from the middle, where it was one inch wide and one inch thick to the ends, where it was three fourths of an inch wide and five eighths of an inch thick, the red and white wood equal in all parts. The string was made of sinew from the back of a cow, split from the long, broad sheath that lies on each side the spine, and the bow strung for trial. Now, on drawing it (flat or white side in front), it was found that one arm bent more than the other, so a little more scraping was done on the strong side, till both bent alike.