Series consists of scores, sketches, notes, edited drafts, correspondence, inspirational materials, and photographs related to Zosha Di Castri’s composition Sprung Testament: Duo for Violin and Prepared Piano. The work is a collaborative piece between composer/pianist Di Castri and violinist Jenny Koh. Koh was planning a series of concerts for National Sawdust, an innovative arts institution located in Brooklyn, New York, and reached out to various composers/performers to participate. Koh set the theme of the concert, asking each composer to engage with the idea of rebirth and evolution. In response, Di Castri wrote Sprung Testament which encapsulates the concepts of spring and rebirth. In their conversations, the two musicians questioned the journey one goes through in life to transcend personal struggles. Di Castri used sticky mounting putty to modify the piano, thereby creating unique sounds and highlighting Koh’s theme of transformation. Print photographs of the prepared piano can be found in the "Images" file of the fonds. Koh and Di Castri premiered Sprung Testament at National Sawdust on March 15th, 2018.