Joseph Delaville Le Roulx

He entered the École des Chartes in 1874 and graduated in January 1878, third in a class of ten, three of whom were members of the Institut de France.

[3] In 1878, Delaville Le Roulx left France to settle on the island of Malta to study the archives of the Order of Saint John of Jerusalem.

King translated into English portions of the Cartulaire that included rules, statutes, or customs of the order while leaving out any charters or documents that did not contain information pertaining to these topics.

He also wrote 18 dissertations on the Order of St. John of Jerusalem, published in 1910 under the title Mélanges sur l'Ordre de saint-Jean-Jérusalem.

In 1904, he published a history of the Hospitallers in the Holy Land and Cyprus called Les Hospitaliers en Terre sainte et à Chypre (1100–1319).