What is the matter, Dave? You look rather mystified." "I am mystified, Laura," replied Dave Porter. "I have a letter here that I can't understand at all." "Whom is it from?" questioned Laura Porter, as she came closer to her brother, who was ensconced in the largest easy-chair the Wadsworth library contained. "It's from a shopkeeper in Coburntown, Mr. Wecks, the shoe-dealer. He wants to know which pair of shoes I have decided to keep, and asks me kindly to return the pair I don't want."