Norman Treigle (né Adanelle Wilfred Treigle (March 6, 1927 – February 16, 1975)[1] was an American operaticbass-baritone,[1] who was acclaimed for his great abilities as a singing-actor, and specialized in roles that evoked villainy and terror.
^ ab"The Demon Within". OPERA NEWS. No. MARCH 2013 — VOL. 77, NO. 9. OPERA NEWS. Retrieved 19 May 2018.