This subseries contains correspondence filed in preparation for a possible history of the Columbia University Libraries. Among the letters are correspondence on library funding, library collections, library buildings, and library regulations and policies. While the subseries contains a few duplicates of items from 1874 and 1862 in the first folder, the bulk of this subseries consists of material between from September 1899 to February 1902. Folder 6 includes a filing memorandum with notes on subjects covered in the history.