The Ida Langdon Papers contain an assortment of teaching and lecture materials from her early tenure as a professor of English Literature at Elmira College, including collegiate materials from her matriculation at Bryn Mawr College. The collection also includes materials from Dr. Lane Cooper, a professor at Cornell University where Langdon received her Doctorate and various letters of correspondence and newspaper clippings. Items concerning her association with her uncle, Mark Twain, are at a minimum.

The collection contains 130 photographs reproduced from the original nitrate negatives of James B. Pond’s photographs of Mark Twain on his North American Lecture Tour, accompanied by his wife and daughter, Olivia Langdon Clemens and Clara Clemens as well as by Major Pond’s wife, Marion Glass Pond. The collection includes a copy of James B. Pond’s typescript draft of his account of Mark Twain in “Eccentricities of Genius” and a typescript copy of his journal from the tour.