A scholarly fact Neville uses as a mystical argument. There is not a scholar worthy of the name writing on Genesis who has any manuscript that is signed; there are three letters - the J manuscript, the E manuscript and the P manuscript - and that is all anyone has to go by, completely unsigned, with no identity attached to the authors. He refuses to leave it as a curiosity of textual criticism and turns it into a question: who were they? How did they come into the world? Were they born as we were born, through the womb of a woman? Or did they appear as he himself once appeared - stepping one night from his bed into another world, solid and real as this one, with people clothed as this audience is clothed, where if anyone had stopped him and demanded a birth certificate or an identification card he could not have produced one, because he had not arrived there by any normal channel of physical birth, and returned here by no known way either. The point he presses is the quality of what these unsigned men produced: treat it merely as literature and you will find nothing greater than Genesis, and as vision, nothing greater at all - fifty chapters whose authors are completely unknown to mortal mind.