Music, Continental manuscripts and printed books, science and medicine : Including the autograph manuscript of Turgenev’s “Fathers and sons” comprising printed books, autograph letters and manuscripts including Pfintzing’s Tewrdannckh, Nuremberg, 1519; Diderot & D’Alembert, Encyclopédie, Paris, 1751-1780; the literary archive of Oedön von Horváth; an important series of letters by Ludwig Wittgenstein; three major autograph manuscripts of Mozart; libretto of “Un ballo in Maschera” in the hand of Verdi (catalogue of an auction sale conducted by Sotheby's, London, 18-19 May 1989)