Gaius, Institutiones IV: Third century AD (?)
One of the oldest known manuscripts of the Institutiones of Gaius, this papyrus is among the many contributions of Oxyrhynchus to the texts of Roman Law. Written in a clear Roman cursive hand familiar from the second or third century AD, the text came complete with numeration in the upper margin designating the number of columns in the roll. The second column, according to this numeration, was the nineteenth of the roll. Thus column one of the roll began with the beginning of the fourth book. Each book will have occupied a separate roll. Note that the writing is set closer at the bottom of the first column: it contained four or five lines more than the next one.
The Oxyrhynchus Papyri vol. XVII 2103