Thump ran quite fast, and so did Nat and Rod.  The girls tried to keep up with their brothers, but it was hard work.  Once Addie fell down, and bruised her knees, but she got up again, without crying, and hurried on.  And once Weezie's dress caught on a bramble bush and was torn.  But Rodney happened to have a safety pin in his pocket, so the dress was mended, after a fashion, and the chase kept up.