Notes used for lectures at Columbia University and other institutions are held in Subseries 3. These lecture notes are arranged by topic and cover subjects such as Russian and American Literature, Jane Austen, Rudyard Kiping, William Wordsworth and Keats. There are also a large number of notes Trilling used for his Comparative Literature Course. In addition, there are three card files holding topical notes on authors and literary works that Trilling often wrote about.