The Mortimer Rare Book Collection consists of archival collections and cataloged items. This means materials can be found through the finding aids or through the library catalog (Discover Advanced).
For example, manuscripts written by Virginia Woolf can be found in the Virginia Woolf papers (an archival collection) and published books by Virginia Woolf can be found in the Discover Advanced catalog here*.
*Make sure to set the location to "Smith College Special Collections" to narrow the results.