Félix Candela was an influential Spanish-born architect and structural engineer, known for his innovative designs using reinforced thin-shell concrete to create the highly efficient hyperbolic parabaloid shapes used in his construction of many well-known churches, factories, and other buildings, primarily in and around Mexico City in the mid-20th century. The collection consists of professional and personal papers, including photographic files documenting his projects, architectural drawings and designs, drafts of lectures and published papers, correspondence, appointment books, student notebooks and artwork, personal photographs and albums, awards and certificates, architectural reference books and magazines, construction materials catalogs, and clippings on various architecture and design topics and on Candela's own work.

The General Manuscripts Collection consists of manuscripts and small collections of papers and records which are related in some way to the history of Princeton University. While most documents in the General Manuscripts collection were produced by alumni or student organizations, there are several documents produced by trustees, faculty, and other members of the University community.

Consists of selected manuscripts and documents of Sparse Grey Hackle, an American author of books about angling.