The album title "Poe through the GLASS PRISM" ... as they took Edgar Allen Poe's work and tranformed to song. Frankly, they were a very good (live) cover band at the time.
Glass Prism - On Joy and Sorrow (1970)
A dark and heavy vibe, really great guitar work sometimes with fuzzy sounds, more on the sorrow side of life then on the joy side. " Your joy is your sorrow unmasked. " They were from Pennsylvania, on the else dark sleeve they have nice colorful suites.