Armide, tragédie mise en musique [full score], Paris: Christophe Ballard, 1686, with musical annotations and authorized with the composer's paraph at end
Autograph manuscript of the poem "Ballade vom blonden und braunen Rittersmann", AN EARLY, HITHERTO LOST, DRAFT FOR THE TEXT OF THE FIRST VERSION OF "DAS KLAGENDE LIED", signed ("Gustav Mahler")
Important autograph letter signed ("Gustav Mahler"), to his friend Anton Krisper, ONLY PARTIALLY PUBLISHED, CONCERNING A TEXT SOURCE FOR "DAS KLAGENDE LIED", the "Ballade vom blonden und braunen Rittersmann", 5 March 1879
Autograph musical quotation of the opening of the Third Symphony, signed and inscribed by the composer ("2/I 1904 / Frau Hofrath Sophie Bassermann / Gustav Mahler")
Four autograph letters to the journalist Eugenio Checchi ("Tom"), about his operas "Guglielmo Ratcliff" and "Iris", and two musical quotations, all signed (“P.Mascagni”)