results were then swiftly copied (since the writing rapidly disappeared: see below), reviewed by Hellenist academics, and then corrected once more, if necessary, by the unrolling/copying team. In 1802, King Ferdinand IV of Naples appointed Rev. John Hayter to assist the process. From 1802 to 1806, Hayter unrolled and partly deciphered some 200 papyri. These copies are held in the Bodleian Library, where they are known as the "Oxford Facsimiles of the Herculaneum Papyri". In January 1816, Pierre-Claude Molard and Raoul Rochette led an attempt to unroll one papyrus with a replica of Abbot Piaggio's machine. However, the entire scroll was destroyed without any information being obtained. From 1819 until 1820, Humphry Davy was commissioned by the prince regent George IV to work on the Herculaneum papyri. Although it is considered that he had only limited success, Davy's chemical method, using chlorine managed to partially unroll 23 manuscripts. In 1877, a papyrus was taken to a laboratory in the Louvre. An attempt to unravel it was made with a "small mill", but it was unsuccessful and was partially destroyed, leaving only a quarter intact. By the middle of the 20th century, only 585 rolls or fragments had been completely unrolled, and 209 unrolled in part. Of the unrolled papyri, about 200 had been deciphered and published, and about 150 only deciphered. Modern attempts The bulk of the preserved manuscripts are housed in the Office of Herculaneum papyri in National Library of Naples. In 1969, Marcello Gigante founded the creation of the International Center for the Study of the Herculaneum Papyri (Centro Internazionale per lo Studio dei Papiri Ercolanesi; CISPE). With the intention of working toward the resumption of the excavation of the Villa of the Papyri, and promoting the renewal of studies of the Herculaneum texts, the institution began a new method of unrolling. Using the 'Oslo' method, the CISPE team separated individual layers of the papyri. One of the scrolls exploded into 300 parts, and another did similarly but to a lesser extent. Since 1999, the papyri have been digitized by applying multi-spectral imaging (MSI) techniques. International experts and prominent scholars participated in the project. On 4 June 2011 it was announced that the task of digitizing 1,600 Herculaneum papyri had been completed. Since 2007, a team working with Institut de Papyrologie and a group of scientists from Kentucky have been using x-rays and nuclear magnetic resonance to analyze