Bodleian Libraries, at Oxford University, which was given by the King Ferdinand of Naples to the Prince of Wales in 1810. The imaging method Seales used involved a hand-held 3-D scanner called an Artec Space Spider. The same year he demonstrated readability success of another Herculaneum scroll, with help of the particle accelerator Diamond Light Source, through a powerful x-rays imaging technique, letter ink which contains trace amounts of lead were detected. This technique could possibly open the door in reading the remaining unopened 500 Herculaneum scrolls. Prior to this he demonstrated successful virtual unrolling without detecting ink on Herculaneum scrolls. Significance Until the middle of the 18th century, the only papyri known were a few survivals from medieval times. Most likely, these rolls would never have survived the Mediterranean climate and would have crumbled or been lost. Indeed, all these rolls have come from the only surviving library from antiquity that exists in its entirety. These papyri contain a large number of Greek philosophical texts. Large parts of Books XIV, XV, XXV, and XXVIII of the magnum opus of Epicurus, On Nature and works by early followers of Epicurus are also represented among the papyri. Of the rolls, 44 have been identified as the work of Philodemus of Gadara, an Epicurean philosopher and poet. The manuscript "PHerc.Paris.2" contains part of Philodemus' On Vices and Virtues. The Stoic philosopher Chrysippus is attested to have written over 700 works, all of them lost, with the exception of a few fragments quoted by other authors. Segments of his works On Providence and Logical Questions were found among the papyri; a third work of his may have been recovered from the charred rolls. Parts of a poem on the Battle of Actium have also survived in the library. In May 2018, it was reported that fragments of the lost work Histories by Seneca the Elder have been found on a papyrus scroll (PHerc. 1067). Additional images See also Conservation issues of Pompeii and Herculaneum Friends of Herculaneum Society Ancient Greek literature Villa of the Papyri Eruption of Mount Vesuvius in 79 Ercolano En-Gedi Scroll References Further reading Armstrong, David. 2011. "Epicurean Virtues, Epicurean Friendship: Cicero vs. The Herculaneum Papyri." In Epicurus and the Epicurean Tradition. Edited by Jeffrey Fish and Kirk R. Sanders. Cambridge; New York: Cambridge University Press Houston, George W. 2013. "The Non-Philodemus Book Collection in the Villa of the Papyri."