Sentence:  If, however, he ceased at that time to <WSD>somnambulize</WSD>, he was given to waking dreams, a sort of lethargy and abstraction that became habitual to him, and after the accès was over, his eyes flashed, his lips quivered, his voice was tremulous with emotion, a sort of ecstacy came over him, and he talked more like a spirit or an angel than a human being. 
Meaning of the word marked with <WSD> tags:  To sleepwalk; to somnambulate.