[We deem it proper to state, that, though the following Treatise of Christian Union appears in nearly all the collected editions of Bunyan’s Works, yet its genuineness has been called in question by the Rev. Mr Philip in his admirable work, “The Life and Times of Bunyan.” Without here entering into this question, we have separately appended it to the works of Bunyan in this volume, and trust that it will not prove unacceptable to our readers, especially considering the efforts that are now being made to promote the living union of all true Christians who hold the one Lord, the one faith, and the one baptism.]