Philippe BOESMANS (born 1936). Autograph musical manuscript signed, Explosives, [1968]; notebook of 20 pages in-fol. (42 x 31,5 cm), paperback with laminated spine. Orchestral score of this piece for solo harp and instrumental ensemble. It is dedicated to its creator, the harpist Francette Bartholomée, who gave the first performance on November 19, 1968 at the Société philharmonique de Bruxelles with the ensemble Musique Nouvelle, conducted by Pierre Bartholomée. [WD18*]. The instrumental ensemble consists of ten players: flute, clarinet, 2 percussionists, piano, 2 violins, viola, cello, double bass. The manuscript, in black pencil on 30-line Sünova paper, was used as a conductor and bears pencil annotations for the direction. The measures are numbered (174). Attached is a copyist's manuscript of the harp part (14 pages 34.5 x 27 cm, pencil on tracing); plus 2 autograph pages (in-4) with details of the percussion and a diagram of the performers' arrangement; and a L.A.S., Nov. 18, 1970, with a list of corrections for the material in Corrélations. * We refer to the "Catalogue commenté des œuvres de Philippe Boesmans" compiled by Valérie Dufour, in Philippe Boesmans. Entretiens et témoignages (Christian Renard and Robert Wangermée ed., Mardaga, 2005).