Kaspar Karl van Beethoven, Brief an Breitkopf & Härtel in Leipzig, Wien, 21. Mai 1803, Autograph

Karl van Beethoven asks the publisher Härtel in Leipzig to enclose the author's copies of the Variations opp. 34 and 35 for his brother in the deliveries to the publisher's Viennese agent Traeg and the Industriekontor. There should be half the amount in each delivery.

Furthermore Karl requests an advertisement in the Allgemeine musikalische Zeitung (AmZ), which Breitkopf & Härtel also publishes, saying that the Piano Sonatas op. 31,1 and 2 which Nägeli has just published in Zurich are full of mistakes. He informs them a list of mistakes for both sonatas will be sent, which should also be published in the AmZ. (However there was no such advertisement because Beethoven decided shortly afterwards to have Simrock in Bonn publish a correct edition of both sonatas.)

Karl offers them new works: an overture (probably the overture to op. 43, which Härtel had already once declined) and a new symphony (op. 55, which was only completed in the autumn). Arrangements of piano works for quartet, done by Franz Xaver Kleinheinz supervised by his brother, can also be sent immediately.