The late Herbert H. Lehman served in the United States Senate from 1949 to 1957, prior to that he was the Governor of New York from 1933 to 1942. He was also the son of Mayer Lehman, who helped found the noted investment banking firm, Lehman Brothers. The Columbia Universities Libraries Rare Book & Manuscript Library holds the Lehman Special Correspondence Files, which contains the Lehman family correspondence with nearly 1,000 individuals dating from 1895 to 1963. Lehman himself started this particular trove in order to isolate materials he wanted for his own personal use. This digital collection contains over 37,000 documents, which include letters from Benjamin Cardozo, Robert F. Kennedy, Adlai Stevenson, Robert Wagner, Alfred E. Smith, Henry Morgenthau, and Harold Ickes. Visitors can use the finding aid to locate specific items, and the search engine offered here is quite advanced.