Félix IBARRONDO (born 1943). Autograph musical manuscript, Nayan for solo viola and strings, 1985-1986; 71 leaves (p. 2-72) 37.5 x 27.5 cm. Concertante piece for viola and string orchestra, premiered on May 19, 1987 at Radio-France, as part of "Perspectives du XXe siècle", by Davia Binder, and the Nouvel Orchestre Philharmonique, under the direction of Philippe Nahon The piece lasts 10 minutes and requires, in addition to the solo viola, 12 violins, 4 violas, 3 cellos, and a double bass. It is dedicated to Alain Féron. The manuscript is carefully written in Indian ink on tracing paper with 21 lines. It is dated at the end " Asnières IX-85/I-86 ".