The recent discovery of remains of a book of the Ab initio bellorum civilium of Seneca the Elder in the PHerc. 1067 is important not only because it proves that this work was preserved in the library of the Villa des Papyri at Herculaneum, but also for its contribution to the dating of other Latin papyri of same library. Taking into account that the work of Seneca the Elder was published by his son Seneca the Young only after the death of his father (c. 39 CE), it is obvious that the P.Herc. 1067 was copied after this date or possibly a few years ago. In my article, after giving an overview of the studies on the latin scrolls of the Library of Herculaneum and the research on their contribution to the palaeography of the Latin papyri, I develop some additional hypotheses that take into ac- count the new data of P.Herc. 1067. I then try to understand why the owners of the Herculaneum Villa in the first century CE (probably still the Pisones family) would have had interest in owning a copy of Seneca the Elder’s work in their library.