Two hours were spent in a way that pleased Laura and Jessie greatly. The girls purchased several things, to be mailed to the folks left behind. Then all walked around to the post-office, both to see the building and to send the things away. It was while the others were addressing their packages and also some picture postcards, that Dave saw a sight that interested him greatly. Near one of the doorways was a small and ragged newsboy with half a dozen papers under his arm. An older youth had him by the shoulder and was shaking him viciously. "I say it was a five-dollar gold piece I gave you yesterday by mistake!" the older boy was saying. "I want it back." "No, it wasn't, mister," the boy answered. "It was a cent, nothing but a cent." "I know better, you little thief! Give me that gold piece, or I'll call a policeman." And again the big youth shook the ragged newsboy, causing the papers to fall to the sidewalk. "Why, it's Link Merwell!" murmured Dave to himself, and he stepped in the direction of the pair who were disputing. Merwell had his back to Dave and did not see him. "Are you going to give me my gold piece or not?" demanded Link Merwell, and now he gave the newsboy such a twist of the shoulder that the ragged lad cried out with pain. "I don't know anything about your gold piece!" cried the boy for at least the tenth time. "Let me go, please, mister! I ain't no thief!" "I'll twist your little neck off for you!" muttered Merwell, and was on the point of hitting the boy in the face when Dave stepped up behind him and caught his arm. "Don't you know better than to hit a little chap like this, Merwell?" he demanded. "Porter!" muttered the western youth, and his face took on a sour look. "Say, this ain't none of your affair!" he burst out. "You keep your hands off." "Please don't let him hurt me!" pleaded the ragged newsboy. "I didn't do wrong, mister. I ain't seen no gold piece. He gave me a cent yesterday for a newspaper, that's all." And the boy looked imploringly at Dave. "He's got a five-dollar gold piece of mine," cried Link Merwell. "I want it. And what's more, Dave Porter, I want you to keep your nose out of my business!" he added, fiercely. "Merwell," answered Dave, as calmly as he could, "I have no desire to interfere in your business. But I am not going to stand by and see you abuse this boy, or anybody else. I know just the sort you are--a bully." "Bah! Just because you had me expelled from Oak Hall you think you can do anything, don't you? Well, just wait till you get out West, that's all! I'll show you a thing or two you won't forget as long as you live!" "Take care that you don't get the worst of it, Merwell. Now let that boy go." And Dave came a step closer and clenched his fists. "Going to help the rascal steal five dollars from me?" "He says he knows nothing of your gold piece and he looks honest to me. Why aren't you more careful of your money?"