The incoming students were called the inner boys (Ottoman Turkish: iç oğlanlar). It took seven years of professional development to graduate. The apprenticeship began in the Sultan's services; progressing to mastering natural and Islamic sciences (formal education); and finally to developing physical fitnesses, and vocational or artistic skills. It is reported by Madeline Zilfi that European visitors of the time commented "In making appointments, Sultan pays no regard to any pretensions on the score of wealth or rank. It is by merits that man rise..Among the Turks, honours, high posts and Judgeships are rewards of great ability and good service."