During [S] Act 7, near the beginning, when WV and PM are standing at the volcano, a peace of flute music is played. I know it has been played multiple times throughout the comic, and is a early piece of hs music, but I can't figure out what it is from originally. Do you know?

This one took some looking into, but I managed to place its origin in Even in Death which was used in [S] Roxy: Sleepwalk, a slightly different mix of it was also used in [S] Act 6 Act 4