 Complete the following phrase:  Joseph was assigned to the Bollandists in 1888, to research Greek and Eastern saints, and taught a course on Sanskrit at the Institut Catholique de Paris. In 1896 he was appointed conservator of manuscripts in the Royal Library of Belgium. He continued to contribute to the work of the Bollandists until 1905. As conservator he systematically catalogued and considerably expanded the Royal Librarys manuscript holdings. He was involved in organising the 