The Gumps #4

The Gumps face a dangerous prison escape in a mysterious old factory building where they suspect enemy agents are plotting, only to discover a coded message hidden in a newspaper dating back to the Spanish-American War that may hold the key to a pirate's treasure. When Chester finds the cryptic message locked away, the family must decipher the code while being pursued by armed villains, leading to a tense confrontation at a river bank where Chester attempts to retrieve what appears to be a treasure chest while a desperate criminal threatens him at gunpoint.