Celebration Materials, circa 1887-1993, collects invitations, programs, mass mailings, event notices, pins, and correspondence relating to the celebration (similar materials can be found in the first scrapbook in Series 4). A typed draft of President Francis Landey Patton's sesquicentennial sermon with corrections, a photograph album of the event, and a published book of sketches from the celebration by William Silas Whitehead can be found in this series as well.

Institutional Congratulations, 1896-1899, includes official congratulations issued to Princeton by colleges, universities, and academic societies around the world. While some were written in Latin, on vellum, or in calligraphy, others were merely written longhand to acknowledge receipt of an invitation from the sesquicentennial organizing committee. Congratulatory documents from Athens, Dartmouth, Paris, Rutgers, Tokyo, and Zurich are especially notable. Documents are sorted alphabetically by institution except for the oversize documents, which are all grouped together.

Memorial Book Autograph Edition Correspondence, 1896-1904, consists of the correspondence between the Rev. George Blackburn Kinkead III, Class of 1899, and participants in the Sesquicentennial Celebration for the purpose of acquiring their signatures. Kinkead pasted the autographs in a Sesquicentennial Celebration memorial book (Box 15) and donated it to the Library in 1904. Material in this series is sorted according to the last initial of the correspondent.

Scrapbooks, 1896-1897, contains seven volumes stored in boxes. The first contains ephemera relating to the celebration, such as invitations, tickets, notices, class newsletters, and press releases. The other volumes hold newspaper clippings about the celebration. These volumes are repetitive because most newspapers chose to reprint the news releases in full. There are, however, some original articles, illustrations, and notices regarding the Sesquicentennial Celebration; and clippings from newspapers throughout the country are represented.

Memorial Book Engravers' Plates, 1898, consists of the engraved plates used to print the illustrations in the memorial book published in that year. Illustrations include portraits of the College's presidents, prominent or new buildings, and an image of the sesquicentennial torchlight procession with former U.S. President Grover Cleveland in the foreground. The plates are arranged alphabetically by subject. The boxes containing the plates are very heavy. Researchers should use care when handling.

Memorial Books, 1898, includes three memorial books whose purpose was to document the Sesquicentennial Celebration. The first volume is unaltered. The second has been enhanced with original documents, particularly those containing the autographs of the College's former presidents and officials involved with the Sesquicentennial Celebration. Hundreds of autographs (almost entirely by people present at the celebration) have been added to the third volume.