Reverse angle shot of the same scene as the cover to The Avengers Annual (Marvel, 1967 series) #14. (Noted by Michael Slark via the GCD Error Tracker.)
The story in two parts plus epilog: part one (26 pp.), Part Two "Heart of Darkness" (13 pp.), Epilog (1 p.).
Fred Snyder believed that a different artist penciled pages 32-38 but Nick Caputo sees no signs of anyone other than Byrne.