Woodbranch Energy Plaza, Houston, Texas, 1982 (unbuilt project)

[Early Conceptual Sketch], untitled. Brown ink sketch on shirt cardboard, 8 x 12 1/2 inches [from photographic copy by Lance Burgharrdt]

Woodbranch Energy Plaza, Houston, Texas, 1982 (unbuilt project)

[Conceptual Sketch], untitled. Black, green and red ink and pencil sketch on black-line print of site plan, 20 3/4 x 31 3/4 inches [from photographic copy by Lance Burgharrdt]

Kaufman Residence, Muskegon, Michigan, 1962 (unbuilt project)

[Early Conceptual Sketch], untitled. Blue ink sketch on yellow loose-leaf paper, 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]

Lewis Residence, Bloomfield Hills, Michigan, 1965-1967

[Conceptual Sketches], untitled. Blue ink sketches on shirt cardboard, 8x12 inches [from photographic copy by Lance Burgharrdt]

Baldwin Public Library Addition, Birmingham, Michigan, 1980-1983

[Conceptual Sketch], untitled. Ink sketch on steno pad paper, 6x9 inches [from photographic copy by Lance Burgharrdt]

Baldwin Public Library Addition, Birmingham, Michigan, 1980-1983

[Conceptual Sketches], untitled. Ink sketches on steno pad paper, 6x9 inches [from photographic copy by Lance Burgharrdt]

Chapel and Educational Facility, U. S. Army, Camp Wildflecken, Germany, 1980-1983

[Conceptual Sketch], untitled. Blue ink sketch on steno pad paper, 6x9 inches [from photographic copy by Lance Burgharrdt]

Chapel and Educational Facility, U. S. Army, Camp Wildflecken, Germany, 1980-1983

[Conceptual Sketches], untitled. Ink sketches on two sides of graph paper, 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]

Embassy Prototype for Foreign Buildings Office, Washington, D.C., 1975 (unbuilt project)

[Conceptual Sketch of Ideal Embassy], untitled. Black and orange ink sketch on graph paper, 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]

University of Nebraska, Wick Alumni Center Competition, Lincoln, Nebraska, 1981 (unbuilt project)

[Conceptual Sketch], untitled. Ink sketch on two sides of shirt cardboard, 8x14 inches [from photographic copy by Lance Burgharrdt]

Bald Mountain Recreational Facility, Pontiac, Michigan, 1964-1969

[Early Conceptual Sketches], untitled. Ink sketches on two sides of shirt cardboard, 8x12 inches [from photographic copy by Lance Burgharrdt]

Ford Motor Company Visitor Reception Center, Dearborn, Michigan, 1971 (unbuilt project)

[Conceptual Sketch of Scheme 1], untitled. Ink sketch on white paper, 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]

State of Wisconsin Office Building, Green Bay, Wisconsin, 1981-1983

[Conceptual Sketches], untitled. Blue ink sketches on two pages of letter from William Schuman, Chairman, The MacDowell Colony, including Gunnar Birkerts' notation, "Dinner Tom Bu" [Buechner, Director of Corning Museum of Glass], 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]

State of Wisconsin Office Building, Green Bay, Wisconsin, 1981-1983

[Conceptual Sketch], untitled. Blue ink sketch on shirt cardboard, 8x14 inches [from photographic copy by Lance Burgharrdt]

State of Wisconsin Office Building, Green Bay, Wisconsin, 1981-1983

[Conceptual Sketches], untitled. Blue ink sketches on tracing paper, 21 x 24 1/2 inches [from photographic copy by Lance Burgharrdt]