内容简介：
Oh, let me get up. Let me ride him for two minutes, Walter. Walter Perkins brought his pony to a slow stop and glanced down hesitatingly into the pleading blue eyes of the freckle-faced boy at his side. "Please I'll only ride him up to the end of the block and back, and I won't go fast, either. Let me show you how I can ride him," urged Tad Butler, with a note of insistence in his voice. "If I thought you wouldn't fall off --"