The Mastery of Languages: Or The Art of Speaking Foreign Tongues, Idiomatically is a book written by Thomas Prendergast in 1869. The book is a guide for people who are interested in learning foreign languages and want to become proficient in speaking them idiomatically. It provides tips and techniques on how to master a foreign language, including pronunciation, grammar, and vocabulary.The book is divided into two parts. The first part is dedicated...