Gloucester's language acquisition was delayed; he did not speak correctly until the age of three, and consequently the commencement of his education was postponed by a year. The Reverend Samuel Pratt, a Cambridge graduate, was appointed the Duke's tutor in 1693. Lessons concentrated on geography, mathematics, Latin, and French. Pratt was an enemy of Jenkin Lewis, and they frequently disagreed over how Gloucester should be educated. Lewis remained Gloucester's favourite attendant because, unlike Pratt, he was knowledgeable in military matters and could therefore help him with his "Horse Guards", a miniature army consisting of local children. Over a couple of years from 1693, the size of the army grew from 22 to over 90 boys.