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‘Abdu’l-Baha’s exposition of the Baha’i Revelation is recorded in His written works, in the many compilations of His recorded utterances, and in His correspondence. The written works such as The Secret of Divine Civilization, A Traveller’s Narrative, the Will and Testament, are available in English translations. Likewise many compilations of His recorded utterances, among which may be mentioned Some Answered Questions, Memorials of the Faithful, Paris Talks, are kept in print. Not for sixty years, however, has any large compilation, in English, of His innumerable letters been made; the three volumes of Tablets of ‘Abdu’l-Baha published the United States between 1909 and 1916, although running into second editions, have long been out of print.