Hopalong Cassidy or Hop-along Cassidy is a fictional cowboy hero created in 1904 byBig on TV, too.
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. He had a wooden leg which caused him to walk with a little "hop", hence the nickname. From 1935, the character—as played by movie actor William Boyd in films adapted from Mulford's books—was transformed into a clean-cut, sarsaparilla-drinking hero. Sixty-six popular films appeared, only a few of which were loosely based on Mulford's stories.
The series and character were so popular that Hopalong Cassidy was featured on the cover of national magazines such as Look, Life, and Time. Boyd earned millions as Hopalong ($800,000 in 1950 alone), mostly from merchandise licensing and endorsement deals. In 1950, Hopalong Cassidy was featured on the first lunchbox to bear an image, causing sales for Aladdin Industries to jump from 50,000 to 600,000 in one year. In stores, more than 100 companies in 1950 manufactured $70 million of Hopalong Cassidy products, including children's dinnerware, pillows, roller skates, soap, wristwatches, and jackknives