 Nonetheless, it could quite possibly have been based on earlier materials.Plentiful citations of the codex by name down to the seventeenth century, particularly for its genealogical doctrines, imply that it had a high status among scholars.Its last known location was in the library of the Earls of Kildare, from which it disappeared at some point in the 1630s or 1640s, the library itself being destroyed and dispersed in 1642.