 Junius was the owner of an important piece of Christian literature called the MS Junius 11 codex,
also known as the "Cædmon manuscript", or "Junius" codex.Junius was a close acquaintance of John Milton.It has been suggested that similarities between Milton's Paradise Lost and parts of the "Genesis" material in MS Junius 11, are the result of Milton having consulted MS Junius 11 via Junius, though this hypothesis cannot be proven.