I didn't have any agent; I've never had an agent.
The crew, like all Italian crews, was generous, warm, and enthusiastic.
After all, film is so porous, and to my mind, so oddly occult, that I think that film itself absorbs odd energies like a living skin.
I don't have an objective overview of Black Sunday.
Certainly, in Italy, nobody takes light for granted.
It is interesting to note that the best periods of Italian Horror films came out of the Sixties, when Italy was enjoying a carnival period of phenomenal optimism, and the shadowy side surfaced with all of its attendant dark, beautiful, baroque, catholic symbolism.