U. S. Embassy Office Building, Helsinki, Finland, 1975 (unbuilt project)

[Roof Study], untitled. Ink sketches on tracing paper, 17x18 inches [from photographic copy by Lance Burgharrdt]

U. S. Embassy Office Building, Helsinki, Finland, 1975 (unbuilt project)

Embassy Window [Studies] (#49). Blue ink sketches on notebook paper, 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]

U. S. Embassy Office Building, Helsinki, Finland, 1975 (unbuilt project)

Embassy Window Studies. Blue ink sketches on notebook paper, 8 1/2 x 11 inches [from photographic copy by Lance Burgharrdt]

University of California Central Library Addition, San Diego, California, 1987-1993

[Early Conceptual Sketches], untitled. Ink sketches on tracing paper, 18 x 22 1/4 inches [from photographic copy by Lance Burgharrdt]

University of California Central Library Addition, San Diego, California, 1987-1993

[Early Conceptual Sketches], untitled. Blue ink sketches on tracing paper, 12x29 inches [from photographic copy by Lance Burgharrdt]

University of California Central Library Addition, San Diego, California, 1987-1993

[Early Conceptual Sketches], untitled. Green ink sketches on tracing paper, initialed, 18 x 28 1/2 inches [from photographic copy by Lance Burgharrdt]

IBM Corporate Computer Center, Sterling Forest, New York, 1970-1972

[Conceptual Sketches], untitled. Ink sketches on tracing paper, initialed, 12 x 25 1/2 inches [from photographic copy by Lance Burgharrdt]

IBM Corporate Computer Center, Sterling Forest, New York, 1970-1972

[Conceptual Sketches], untitled. Black and brown ink sketches on tracing paper, 12 x 23 3/4 inches [from photographic copy by Lance Burgharrdt]

IBM Corporate Computer Center, Sterling Forest, New York, 1970-1972

[Conceptual Sketches], untitled. Brown ink sketches on tracing paper, initialed, 12x26 inches [from photographic copy by Lance Burgharrdt]

Glen Oaks Community College, Centreville, Michigan, 1966-1971

[Conceptual Sketches], untitled. Brown ink sketches on two sides of shirt cardboard, with notation, "see also other side," 6x8 inches [from photographic copy by Lance Burgharrdt]

Glen Oaks Community College, Centreville, Michigan, 1966-1971

GB Sketch #26 [of Site Plan]. Black ink and colored pencil sketch on tracing paper, 12 x 24 1/2 inches [from photographic copy by Lance Burgharrdt]

Corning Public Library (first proposal), Corning, New York, 1969 (unbuilt project)

[Conceptual Sketch of Building as a Bridge], untitled. Ink sketch on tracing paper, representing the beginning of polygonal thought in Gunnar Birkerts' work, 12 x 19 3/4 inches [from photographic copy by Lance Burgharrdt]

Corning Public Library (first proposal), Corning, New York, 1969 (unbuilt project)

[Conceptual Sketch of Building as a Bridge], untitled. Ink sketch on tracing paper, 11 1/2 x 12 inches [from photographic copy by Lance Burgharrdt]

Corning Public Library (first proposal), Corning, New York, 1969 (unbuilt project)

[Conceptual Sketch of Building as a Bridge], untitled. Ink sketch on tracing paper, 12 x 12 1/4 inches [from photographic copy by Lance Burgharrdt]

Corning Public Library (first proposal), Corning, New York, 1969 (unbuilt project)

[Conceptual Sketches of Building as a Bridge], untitled. Ink sketches on two sheets of tracing paper, 12 x 27 1/2 & 12 x 33 inches [from photographic copy by Lance Burgharrdt]