T hirty million miles out, Keeter began monitoring the planet's radio and television networks. He kept the vigil for two sleepless days and nights, then turned off the receivers and began a systematic study of the notes he had taken on English idioms and irregular verbs. Twelve hours later, convinced that there would be no language difficulty, he left the control room, went into his cabin and fell into bed. He remained there for sixteen hours. When he awoke, he walked to a locker at the end of h