A plan of topographical survey for the property of Mr. John Hertz. Cary, Illinois

Blue, yellow, black ink on linen; topo. lines, elevations. Signed. 178 cm. x 86 cm. Scale: 1"=40' [from photographic copy by Lance Burgharrdt]

A plat of topo. survey for a portion of the estate of Mr. John Hertz. Cary, Illinois

Brown, black ink on linen; topo. lines, elevations. Unsigned. 55 cm. x 58 cm. Scale: 1"=40' [from photographic copy by Lance Burgharrdt]

Planting plan for Mr. John Hertz. Cary, Illinois

Pencil on tracing paper; location, type of planting; notes. Signed. 126 cm. x 76 cm. Scale: 1"=20' [from photographic copy by Lance Burgharrdt]