A collection of ephemera of a Lehigh alumnus, Rollin Reuben Keim, concerning his personal interests, his career as a City of Bethlehem businessman and contributions to his Lehigh Class as Class correspondent for Lehigh Alumni Bulletin. Major portion of the collection is data and visual material related to the Hill-to-Hill Bridge, Bethlehem, Pennsylvania.

These papers reflect an era of formally engraved invitations, letters of appreciation among faculty, students, university presidents and alumni and general camaraderie. Interesting historical notes are stated in some of the letters in the exchange between a faculty member and three University presidents.