This may sound daft but.....I recently bought a DVD of a movie starring BELA LUGOSI (big fan) called WHITE ZOMBIE! Now, I'm a huge MORRICONE fan (have seen him in concert twice) so no disrespect to the master intended. BUT, the opening scene contains a soundtrack, that I can only dream was written by ENNIO'S grandfather, cause this soundtrack from this 30's movie is straight out of a MORRICONE (music wise) movie. It sounds like something from THE BIG GUNDOWN or NAVAJO JOE. Please, somebody grab a hold of this flick n' reasure me I'm not losing my mind! It's very, very strange! 
it 's not daft.
The main title to WHITE ZOMBIE was reworked by Morricone for use in EXORCIST 2.
Whether this was an "hommage", unintentional, or heaven forbid an outright swipe, I don't know.
I brought this up on the Morricone board some yrs back-and the subject was roundly and completely IGNORED.