Library classifications were preceded by classifications used by bibliographers such as Conrad Gessner. He was known as "the doyen of standard Persian language bibliographers". Evans did not have formal training of the scholars, bibliographers, and librarians who surrounded him. Other bibliographers that followed him had various opinions on him. In 1909, Wood began organizing the college library to train librarians and bibliographers. It is more than probable that the two Samuels have been confounded by bibliographers. Descriptive bibliographers follow specific conventions and associated classification in their description. The bibliographers for Africa, Latin America and Judaica are also based in the same building.