A Dictionary of Music and Musicians (1900)
“ In 1809 he made another tour through the north of Germany, and at Hamburg received a commission for an opera, 'Der Zweikampf mit der Geliebten'—or 'The Lovers' Duel'—which was produced with great success the year after. At this time he had already written six of his violin-concertos, and as a player had hardly a rival in Germany. The year 1809 is memorable for the first Music Festival in Germany, which was celebrated under Spohr's direction at Frankenhausen, a small town in Thuringia. It was followed by another, in 1811, for which Spohr composed his first symphony, in E♭. ”
