Large oblong folio (483 x 889 mm; 19″ x 35″ ); two sheets taped together to make one large leaf. Executed in various colors of ink including black, brown, green, red, orange, yellow, and pink. Signed by composer at lower right corner.

Sketch of form. Oblong quarto (214 x 276 mm; 8.5″ x 10.9″). Executed in black and blue ink on verso of page of printed music. Title and date in manuscript to lower left corner “Messy sketch of Prisms of Lights / Map of Form / 2013.” Signed and dated by composer at lower right “Augusta Read Thomas / (2013).”
Together with: 2 ff. sketches (ca. 368 x 247 mm.) on 20-stave music paper; 1f. sketch of form (214 x 276 mm.).
Map of form in good condition. Some creasing to right margin and lower right corner.
Sketches quite creased with some ragged edges and dampstaining.
The Hemke Concerto premiered on 27 February 2014 by the New Haven Symphony with Frederick L. Hemke (saxophone), conducted by William Boughton.