People's Gas Building, Chicago, Illinois, Office Plan and Elevations1922 · Graphite, red, and blue pencil on tracing paper64 × 99.1 cm (25 3/16 × 39 in.)Art Institute of Chicago
National Life Insurance Co. Building, Chicago, Illinois1920 · Graphite on tissue paper101.6 × 63.5 cm (40 × 25 in.)Art Institute of Chicago
Wrigley Building: Finial (original)1919 · White-glazed Terra-cottaApprox.: 85 × 43 × 43 cm (33 × 17 × 17 in.)Art Institute of Chicago
National Life Insurance Company Building, Chicago, Illinois, Design Study1916 · Graphite on tracing paper58.4 × 71.1 cm (23 × 28 in.)Art Institute of Chicago
National Life Insurance Company Building Byzantine-Moorish-Style Proposal, Chicago, Illinois, Elevation Sketch1916 · Graphite and red crayon on tracing paper79.1 × 45.6 cm (31 1/8 × 17 15/16 in.)Art Institute of Chicago
National Life Insurance Company Building Classical-Style Proposal, Chicago, Illinois, Elevation Sketch1916 · Graphite on tracing paper73.5 × 51.6 cm (28 15/16 × 20 5/16 in.)Art Institute of Chicago