The secret note is an item found in Freddi Fish 4: The Case of the Hogfish Rustlers of Briny Gulch. When Freddi and Luther are asking the owners of the saloon about the hogfish rustlers, they told them that they saw rustlers the other day and sat at the table near the door. Under the table, there is a note telling the rustlers to meet at High Tide, memorize the combination and eat it. When Freddi and Luther leave, Eight Finger Phil suspiciously makes a phone call about the note. Once Freddi and Luther unlock the door while using the combination written on the note, Luther eats it, which tasted like paper.