By the late 1610s Gibbons was undoubtedly the most important musician and composer at court as Byrd had retired in Essex and Bull had fled to the Low Countries to avoid a charge of adultery. In 1617 Gibbons gained the position as keyboard player in an ensemble, organised by John Cooper, for the privy chamber of Prince Charles (later King Charles I). Gibbons was the only keyboardist in a group of 17 musicians of whom the Prince himself was thought to have occasionally joined on either the Bass-Viol or Viol da Gamba. It is likely that Gibbons was able to write for this ensemble and had pieces premiered by it. In addition to this, Gibbons probably gained a 3rd position in September 1619, attending the royal privy chamber of James I. His next major work, "Fantasies of Three Parts" was published around 1620 and dedicated it to Edmund Wry. This seemingly random dedication has provoked much speculation. It may be because Wry could secure Gibbons a better post, or it may be an action of gratitude for having already secured him the post for the royal privy chamber of the King.