Musicologist Balazs Mikusi, head of the Hungarian National Szechenyi Library’s music collection in Budapest, made a startling discovery while sorting through a folder of unidentified music scores. He found the first four-pages of the original manuscript to Wolfgang Amadeus Mozart’s Piano Sonata in A Major. The final page of the manuscript is located in Mozart’s hometown, Salzburg, Austria, but up until now, no one knew what had become of the rest of the pages. This original version contains subtle differences in phrasing, dynamics, and occasionally notes, to published editions of the sonata. It remains a mystery as to when and how this priceless Mozart manuscript ended up in Hungary.