1. Correspondence - R. F. Flint
    1. Correspondence - R. F. Flint
    1. Correspondence - G
    1. Correspondence - Geological Society of America (GSA)
    1. Correspondence - H - 1
    1. Correspondence - H - 2
    1. Correspondence - I
    1. Correspondence - Illinois Geological Survey
    1. Correspondence - J
    1. Correspondence - K
    1. Correspondence - L - 1
    1. Correspondence - L - 2
    1. Correspondence - M - 1
    1. Correspondence - M - 2
    1. Correspondence - Mailing lists
    1. Correspondence - N
    1. Correspondence - J. A. M Robinson
    1. Correspondence - S - 1
    1. Correspondence - S - 2
    1. Correspondence - S - 3
    1. Correspondence - T
    1. Correspondence - W
    1. Correspondence - U-Z
    1. Correspondence - E. O. Ulrich
    1. Correspondence - University of Wisconsin
    1. Correspondence - Unfiled
    1. Correspondence - Published papers [unfiled]
    1. Correspondence - "The base of St. Peter sandstone in southwest Wisconsin"
    1. Correspondence - Baron Gerard de Geer
    1. Coorespondence - Eell record display board
    1. Correspondence - "Development of the theory of multiple glaciation in North America" (Wisconsin Academy of Sciences, Arts and Letters, v. 23)
    1. Correspondence - "Evidence of dissected erosion surfaces in the driftless area"
    1. Correspondence - "Field photography for geologists"
    1. Correspondence - William S. Cooper, J. M. Hansell thesis, "Glacial geology of northwestern Wisconsin"
    1. Corresondence and notes - "Groundwater resources of the Mississippi basin in Illinois, Iowa, Minnesota, and Wisconsin"
    1. Correspondence - Landforms of the Baraboo district
    1. Correspondence - Drafts of Thwaites articles for McGraw Hill Enclyclopedia of Science and Technology
    1. Correspondence - Lawrence Martin memorial (Geological Society of America proceeding)
    1. Correspondence - Michigan Academy of Science, Arts, and Letters
    1. Correspondence - Proposed Moraine National Park
    1. Correspondence - New York State Museum
    1. Correspondence - 1932 revision of WGNHS bulletin 36
    1. Correspondence - Pleistocene part of northeast Wisconsin
    1. Correspondence - Recent stream intrusion by Amy Thwaites
    1. Correspondence - Kansas Geological Society's central U.S. cross-section (Michigan, Wisconsin, Illinois)
    1. Correspondence - Cross-section prepared for 8th field trip of Kansas Geological Society (Mississippi Valley)
    1. Correspondence - Kansas Geological Society's 9th annual field conference - part 1
    1. Correspondence - Kansas Geological Society's 9th annual field conference - part 2
    1. Correspondence -16th session of International Geological Conference, incl. excursion c-3 - part 1
    1. Correspondence - 16th session of International Geological Conference, incl. excursion c-3 - part 2
    1. Correspondence and other material - Tri-state conferences (Wisconsin, Illinois, Iowa)
    1. Correspondence - Sparta-Tomah
    1. Sparta -Tomah figures incomplete
    1. Sparta -Tomah revised manuscript
    1. Unpublished report - "Age of the sandstones around Lake Superior"
    1. Artesian wells - 3 reports
    1. Brown County - short report
    1. Review and two short reports
    1. Devil's Lake - short report
    1. Correspondence and unpublished review - "Farmdale drift in northwestern Illinois" and draft of unpublished paper on glacial geography of the Wisconsin-Illinois border
    1. Correspondence criticism - Glacier thinning during deglaciation (Flint, Demorest)
    1. Correspondence - Great Lakes publications
    1. Correspondence - unpublished paper - "Hypothesis of origin of the Finger Lakes, NY" written for New York State Museum
    1. Unpublished report "Making maps from photographs…" and course material from Geology II - mapping (incomplete)
    1. Correspondence and unpublished report - Possibility of oil in Michigan and Wisconsin
    1. Manuscript - Road materials in south-central Illinois
    1. Consultation - Rocky Dell Spring, Inc.
    1. Correspondence and drafts - unpublished paper, "Some underfit streams in central Illinois"
    1. Unpublished report - "Some geological myths"
    1. Studies of the sub-marine deposits of the coasts of the U.S.
    1. Unpublished report - "Terraces of Allegheny River"
    1. Water supply - Manitowoc
    1. Water supply - Marinette
    1. Water supply - Oshkosh
    1. Water supply - Vienna, Illinois
    1. Water supply - Waukesha Springs
    1. Correspondence and report - Water supplies in Wisconsin
    1. Reports - Miscellaneous water supply reports and well reports
    1. Manuscript of thesis - "Geology of the vicinity of Lakes Waubesa and Kegonsa, Dane County, Wisconsin"
    1. Copy of thesis, "Geology of the southeast quarter of the Cross Plains quadrangle"
    1. [Cover]
    2. Outline of glacial geology
    3. [Introduction]
    4. Discovery and evidence of pleistocene glaciation
    5. [Cover]
    1. [Section]
    1. Manuscript and figures for unpublished book on geomorphology
    1. Letter to Edwards Brothers, Publishers, Ann Arbor, Michigan
    1. Course material for Geology 11 - Mapping - part 1
    1. Course material for Geology 11 - Mapping - part 2
    1. Course material for Geology 102 - Wisconsin geology
    1. Course material for Geology 109 - Geomorphology - part 1
    1. Course material for Geology 109 - Geomorphology - part 2
    1. Correspondence and course material for Geology 109 - Geomorphology
    1. Course material for Geology 130 - Physiography of the U.S. - 1
    1. Course material for Geology 130 - Physiography of the U.S. - 2
    1. Course material for Geology 130 - Physiography of the U.S. - 3
    1. Course material for Geology 130 - Physiography of the U.S. - 4
    1. Course material for Geology 130 - Physiography of the U.S. - 5
    1. Course material for Geology 143 - Glacial geology - 1
    1. Course material for Geology 143 - Glacial geology - 2
    1. Transcribed lectures for Historical geology course
    1. Exercises & syllabus for Soils course
    1. Essay on field methods and equipment
    1. Reading lists - courses (unidentified)
    1. Album of photographs
    1. Correspondence - Pleistocene - part of northeast Wisconsin
    1. Correspondence - Thwaites family and Lee Clayton