Additional figures and background art by Marie Severin. Info per Nick Caputo, June 2015.
The monster pictured is The Abominable Snowman (from Tales to Astonish #24); it is unclear why the cover to Tales to Astonish #18, where "Gorgilla Strikes Again" was not used.
Narrated in the first person. Gorgilla last appeared in the story reprinted in (Monsters on the Prowl (Marvel, 1971 series) #9 (February 1971), and later appears in Marvel Universe (Marvel, 1998 series) and Defenders (Marvel, 2001 series) #1 (March 2001).