Dessert, Duo No. 13 is the lightweight of Darr's numbered Duo series. I can only assume that the title Dessert indicates that the piece is akin to a small sweet or treat. It's a simple waltz that trades off arpeggios and scales between the players. The second half of the piece dives directly in the flatted major sixth harmony; a harmonic shift commonly done by Beethoven or Robert Schumann, but not that common for guitar music of the period. I don't have a printer's copy or manuscript to compare with the printed score, but the introduction, to me seem out of phase and out of character to Darr's normal precision and clarity. I believe it sounds better the way that I have engraved it. If you want to play it the way the score indicates, then just shift the opening 3 bar passage of Guitar II over one beat, starting on beat 2, bar 1. Additionally, you must put a fermata on the final chord that ends on beat 1, bar four. The first known publication of Duo No. 13 was in February of 1910, in the Munich Guitar Club's Gitarristische Vereinigung e.V. Sitz in München., Jahrgang XI. For more information on Darr see my DMA research paper "ADAM DARR (1811-1866) THE CAREER AND WORKS OF A GERMAN ROMANTIC GUITARIST AND ZITHERIST."