This story is adapted from Witches Tales (Ace Magazines, 1951 series) #17 (February 1953)
"©—Editorial Vilmar—Barcelona—The Illustrated." Other printings of this story include: Escorpion (Vilmar, 1973 series) #58 (June 1982)
This story is based on "Black Knight" from Black Cat (Ace Magazines, 1946 series) #43 (April 1953)