 Each movement of Holst's work was originally called only by the second part of each title (I "The Bringer of War", II "The Bringer of Peace" and so on); the present titles were added in time for the first (incomplete) public performance in September 1918, though they were never added to the original score.A typical performance of all seven movements is about fifty minutes long, though Holst's own electric recording from 1926 is just over forty-two and a half minutes.One explanation for the suite's structure, presented by Holst scholar Raymond Head, is the ruling of astrological signs of the zodiac by the planets