"Originally recorded in 1973, this vinyl rarity is best described as an electronic ceremonial soundtrack. After being discovered in a hidden compartment beneath a closet floor, Fonetap Music has obtained the rights and reissued it in all its dusty glory."
That's their story and they're sticking to it. In any case, Grant Moros' all-instro all-electro "Mysteries" certainly sounds like it could have been recorded in the early '70s, and the whole occult ritual aspect of it recalls Moog-master Mort Garson's excursions into that realm.
Lots of nice stuff here: the song "Neophyte's Illumination" hints at a more low-key "Popcorn," and "Ritual of the Serpent" makes great use of primitive drum machines. "Death Be The Penalty" is as intense and scary as it's title, but it's immediately followed by the genuinly lovely "Rosslyn's Crypt." You can download the whole thing here:
Grant Moros "Mysteries"
but buy it here in various formats, including the fancy-shmancy FLAC. Rumor has it that there's a vinyl version availble, which would worth picking up for that cool artwork alone.