It is one of four inhabited planets in the Erhal system. According to Smith, humans first arrived on Sartorias-deles through world gates untold millennia ago. Occasionally, still more humans arrive. However, in non-canon commentaries the author informs readers that most of the early human history on Sartorias-deles has been lost since the so-called Fall of Sartor approximately 4,000 years before the events of the books such as "Senrid". Smith does indeed appear to intend these humans be portrayed as having been Terrans prior to their immigration to the Erhal system. For example, in numerous references throughout the stories, they appear to have brought with them several domesticated animal species, including cattle, horses, and dogs, as well as many foods such as coffee, rice, the tomato, and concepts such as the seven-day week. Other: