Those who have laboured and prayed specially for Christian Unity will read, reread, ponder and treasure this book with great gratitude. We pray that it will be very widely read and studied. Such writing has been awaited by Anglicans for at least a century: we could hardly expect it before when the nation which we represented was still persecuting the Church of Rome in our land. Perhaps it is in the fulness of time that it has come: for the work seems to be in striking concord with the teaching and spirit of Pope Pius XII, the inspired leader whom Providence has given to edify and guide the Church of our day. One of its excellences would seem to be that it indicates practical applications of the latter's counsels in the special conditions of our land.