John Wayne Adventure Comics #10

John Wayne becomes involved in a dangerous quest for a legendary black pearl when he helps a young man named Johnny search an underwater cave. After discovering an enormous oyster that may contain the pearl, Wayne and his companions face threats from criminals who also seek the treasure, including a man named Bonanza who will stop at nothing to claim it. The story culminates in a confrontation where Wayne must protect the pearl and overcome Bonanza's ruthless schemes to survive.