Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alan Walker Tyson (October 27, 1926 November 10, 2000) was a British musicologist who specialized in studies of the music of Wolfgang Amadeus Mozart and Ludwig van Beethoven. He was Senior Research Fellow at All Souls College, Oxford, and a Fellow of the British Academy. One of his most celebrated publications was Mozart: Studies of the Autograph Scores, whose chapters detailed the study of watermarks in Mozart's autographs as a method of dating the scores. This book also included several Tyson discoveries, such as the true ending to the Rondo in A for Piano and Orchestra, K. 386, which previously had only been known in a completion arranged for solo piano by Cipriani Potter and published in 1837. Tyson also established that the standard version of the second movement of Mozart's Horn Concerto in D, K. 412/514, was actually completed after Mozart's death by his pupil Franz Xaver Süssmayr. Additionally, Tyson edited a noteworthy series of volumes entitled Beethoven Studies. His interest in watermarks and paper studies on Beethoven scores actually predated his involvement in those of Mozart.