Jacobus H. Petzer, citing Harry Y. Gamble, K. Junack and Barbara Aland in support, distinguishes between "the original text" of the New Testament and "the autographs" of the documents it incorporated. There is a gap of about a century (more in the case of the letters of Paul the Apostle, less in the case of elements such as the Gospel of John) between the composition of the actual autograph documents, the original incorporation of a version of them into the New Testament, and the production of the extant New Testament manuscripts in which, according to the Howard hypothesis, the Tetragrammaton might once have been written, before being eliminated without trace from all existing manuscripts.