The next state librarian, Thomas Lynch Montgomery, made significant advances to the library. His tenure lasted from 1903 to 1921. He worked with other library organizations to improve access of materials to people across the state, and the state library collection was vastly diversified. Montgomery was a vital influence in the development of the Pennsylvania State Archives in 1903 and in the State Museum of Pennsylvania in 1905, which were divisions of the library. However, in 1941 these two divisions were separated from the state library.