This beautifully engraved artwork, dated 1749, from Thomas Jefferys is a unique insight into the hierarchy of the Ottoman army in the mid-18th century.The engraving depicts the habit of the commander in chief of the Spahis, which was an elite body of horsemen belonging to the Sultan. It can be viewed as a primary source since it represents the combination of practical armors and elaborate textiles in the dress style of the Ottoman military forces. Thomas Jefferys was a distinguished geographer and engraver for King George III and famous for his accuracy.