He was director of studies at the École pratique des hautes études and specialist in the history of Protestantism.

In 1919, he defended his thesis at the École des chartes, entitled Study on the chancelleries and diplomacy of the counts of Toulouse (804-1209) and was made a paleographer archivist, major of his promotion.

[4] The first part of his research career is devoted to medieval Italy during the Angevin presence.

[2] He was appointed to the manuscripts department of the National Library (1922-1927) where he was responsible for the catalog of the Protestant collection, and the “Nouveau d'Hozier”, genealogical archives of a noble family,[5][6] then at the French Institute in Naples (1927-1934).

[9] He taught at the University of São Paulo from 1948 to 1950 and of Church History at the Free Faculty of Reformed Theology of Aix-en-Provence.