Hello Sir,<br/><br/>1.He shut his eyes tight and encased himself in his blanket once again and <b>unkown to himself</b> fell asleep and in sleep was <b>racked with nightmare</b>. <br/><br/>Unknow to himself means here that I was in deep slumber?<br/><br/>What is meanig of "racked with nightmare"<br/><br/>Thanks and regards.