Fonds consists almost entirely of textual materials created or acquired by Fritz Lehmann, in both his professional and personal capacities. The materials include research notes, lecture materials, course hand-outs, manuscripts of articles and book reviews, research papers written by students, correspondence, reports, newspaper and magazine clippings (original and photocopied), and research grant applications. Also included are a folder of tributes written after Lehmann's death, and some personal correspondence addressed to Joanna Lehmann.
The fonds is arranged in the following series: Lecture Materials, Indian railways Correspondence and Research, Course Materials, Correspondence, Publications, Book Reviews, Personal, and Research Grants and Applications. These series largely reflect the original order in which the fonds was acquired. Most materials are arranged in chronological order, to reflect the evolution of Lehmann's teaching and research interests and activities.