This Barcarolle -a song which you should play while poling a gondola in Venice- comes from the Recreation pour le Guitariste by Napoleon Coste. A nice piece to play in clear phrasing and a romantic mood. Somehow this piece reminds me of Schubert. Note that this Barcarolle has a bit more of a technical challenge.
The passages with the flageolets are subject to discussion. The original indicates that you have to play natural harmonics sometimes at the third and fourth frets. That’s not much of a sound. I would recommend to convert them into artificial harmonics, or to omit them and play the notes as a cadence.