History
Doctor Thaxton was a scientist hired by Richard Raleigh to turn a small-time crook into the Man-Monster. He was killed when Raleigh's townhouse collapsed during the fight between the Monster and Spider-Man.
Notes
The story from Spectacular Spider-Man Magazine #1 was re-adapted in Amazing Spider-Man #116 - Amazing Spider-Man #118. It is unclear which of the two versions are to be considered in continuity.