This analysis of the Gospel according to St John provides the evidence of the 23 papyri, presenting the material in three ways. The first section provides transcriptions of the witnesses, with notes recording difficulties and differences from earlier transcriptions. The second provides a complete apparatus criticus. For each verse there is a record of the extent of the papyri available for it, and a list of all divergences from the collating base. The third section provides a set of plates of all the papyri except p(66) and p(75). The text also contains a detailed introduction and sections on dating and the comparative extent of the papyri.