1. The parts, now at Bonn, Beethoven-Haus, BH 84, may be viewed at the digital website of the Archive. The autograph inscription, often reproduced, may be found in Sieghard Brandenburg, “Beethovens Streichquartette op. 18,” in Beethoven und Böhmen: Beiträge zu Biographie und Wirkungsgeschichte Beethovens, ed. Sieghard Brandenburg and Martella Gutiérrez-Denhoff (Bonn: Beethoven-Haus, 1988), 271–272.