six o'clock
When he was admitted he went straight to the library , climbed on to the chair , upon which the volumes of the Encyclopædia still remained , and continued his reading where he had left off on the previous evening . He read steadily throughout the day without giving utterance to speech of any kind . Challis and Lewes went out in the afternoon , and left the child deep in study . They came in at six o'clock , and went to the library . The Wonder , however , was not there . Challis rang the bell . `` Has little Stott gone ? ''