Beethoven dedicated two piano and violin sonatas, Op. 23 and Op. 24, to Fries, in return for his financial support. Von Fries inadvertently compromised the publication of these sonatas - Beethoven had arranged that, as their sponsor, the sonatas would be supplied to von Fries in manuscript for his exclusive enjoyment for a year prior to putting them to press. However, von Fries was tricked into supplying these manuscripts to the publisher Artaria, who immediately brought out a 'pirated' edition without Beethoven's permission. However, this error was evidently not fatal to Fries's relationship with Beethoven, who went on to dedicate his Op. 29 quintet and his Seventh Symphony to him.