Assertion: concerto | /r/CreatedBy | mozart's hand
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Source sentences:
text: This has proven a problematic decision, 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.
text: The only relic of this concerto written in Mozart's hand is an excerpt of an earlier rendition of the concerto written for basset horn in G (K. 584b/621b).[citation needed]