Never in her life had Keineth been on a horse's back, but she had caught the challenge in Billy's laughing eyes and her soul flamed with daring. She clenched her teeth tightly and, because she was in mortal terror of slipping off from the pony, she gripped her knees with all her might against his shaggy sides. In a funny little gallop--very like a rocking horse--he circled the house, while from the shed Billy and Peggy shouted to her