The pre “Hostage to the Devil” Malachi Martin and post HTTD MM is an interesting, plausible analysis. The anti-evolutionary stance he presents writing about the exorcism of the Catholic priest that had fallen into theological error “Father Bones and Mr. Natch” is quite compelling.

Malachi said his first exorcism was as a young assistant in Cairo, Egypt years prior while working as an archaeologist. Perhaps he had a crisis of faith between the first exorcism and the one(s) chronicled in “Hostage…”

Malachi Martin was an Air Force chaplain. They carry a small pyx. Perhaps this was a carryover practice at the talk mentioned here.

I think Malachi was legit. Definitely Malachi was an authority in more than one religious area.