If scholars agree with they are in ownership of a precious object, they will discover ways to value it, and they're going to value the work they do with it all of the more. What may have prompted Mozart into completing the deserted basset horn concerto for Stadler and his basset clarinet, was his adventure to Prague for the most advantageous of La Clemenza di Tito. One of his vacationing partners was his pupil Süssmayr, who found out that he was writing a basset clarinet concerto for Stadler. Mozart couldn't allow himself to be outdone. The concerto was written in Vienna some time among the tip of September and the starting of October 1791. The completed score was sent off to Stadler in Bohemia and it received its first functionality at Stadler’s advantage live performance in the Prague Theatre on October 16, 1791. Seven weeks later, Mozart was dead. Even in Mozart's day, the basset clarinet was a rare, custom made tool, so when the piece was published posthumously, a new edition was arranged with the low notes transposed to usual range. This has proven a problematic resolution, as the autograph no longer exists, having been pawned by Stadler, and until the mid 20th century musicologists did not know that the only version of the concerto written by Mozart's hand had not been heard since Stadler's lifetime. Once the problem was discovered, makes an attempt were made to reconstruct the fashioned edition, and new basset clarinets were built for the actual purpose of appearing Mozart's concerto and clarinet quintet. There can no longer be any doubt that the concerto was composed for a clarinet with an extended range.