It was spoken in the law courts, schools, and universities and, in due course, in at least some sections of the gentry and the growing bourgeoisie. Private and commercial correspondence was carried out in Anglo-Norman or Anglo-French from the 13th to the 15th century though its spelling forms were often displaced by continental spellings. Social classes other than the nobility became keen to learn French: manuscripts containing materials for instructing non-native speakers still exist, dating mostly from the late 14th century onwards.