B-flat instead of A and played his part in C-sharp.” Thus Wegeler in his “Notizen” (pg. 36). But he has confounded two compositions. The concerto which Beethoven played on March 29, 1795, was not that in C (Op. 15) which was not yet finished, but, in all probability, that in B-flat (Op. 19). For the fact that the Concerto in B-flat was composed before that in C we have the testimony of Beethoven himself, who wrote to Breitkopf and Härtel on April 22, 1801: “I simply want to call your attention to the fact that one of my first Concertos will be published by Hoffmeister, which is not among my best works, and one also by Mollo which, though composed later, etc.” The Concerto in B-flat was published in 1801 by Hoffmeister and that in C in the same year by Mollo and Co. in Vienna, the latter a little in advance of the former, wherefore there need be no surprise at the earlier _opus_ number. Beethoven also took part in the second concert on March 30, the minutes of the Tonkünstlerschaft recording that he “improvised on the pianoforte”; and though busily engaged he also embraced an opportunity to testify to his devotion to the manes of Mozart. On March 31, 1795, Mozart’s widow arranged a performance of “La Clemenza di Tito” in the Burgtheater. “After the first part,” says the advertisement, “Mr. Ludwig van Beethoven will play a Concerto of Mozart’s composition on the Pianoforte.” We opine that this concerto was Mozart’s in D minor, which Beethoven loved especially and for which he wrote cadenzas. The Trios, Op. 1, had now become so well known and appreciated in musical circles as to justify their publication, and accordingly, an advertisement inviting subscriptions for Ludwig van Beethoven’s “three Grand Trios” appeared in the “Wiener Zeitung” on May 16, 1795. Three days later a contract was signed by the author and Artaria and Company. The printed list of subscribers gives 123 names, mostly belonging to the higher circles, with subscriptions amounting to 241 copies. As Beethoven paid the publisher but one florin per copy, and the subscription price was one ducat, he made a handsome profit out of the transaction.[73] FIRST PIANOFORTE TRIOS AND SONATAS