Hopalong Cassidy

Hopalong Cassidy or Hop-along Cassidy is a fictional cowboy hero created in 1904 by the author Clarence E. Mulford, who wrote a series of popular short stories and many novels based on the character.

In his early writings, Mulford portrayed the character as rude, dangerous, and rough-talking. From 1935, the character—as played by movie actor William Boyd in films adapted from Mulford's books—was transformed into a clean-cut hero. Sixty-six popular films appeared, only a few of which relied on Mulford's stories. Mulford later revised and republished his works to be more consistent with the character's screen persona.