Nocturne No. 1, Op. 4 by Mertz (PDF)
Nocturne No.1, Op.4 by Johann Kaspar Mertz (1806–1856). PDF Sheet Music for Classical Guitar. Includes both a notation-only edition and a separate tab edition. PDF Download. Level: Intermediate (Grade 6).
Nocturne (Notturno) No. 1, Op. 4 by Johann Kaspar Mertz. Mertz was a Hungarian guitarist and composer who wrote many concert works for guitar as well as some easier collections including Op.4. It's a more mature work that nicely transitions intermediate players into more advanced works. Here's the YouTube Lesson Link if you want to watch it there.