"I spent a morning perusing the Hemingway papers at the JFK Library in Boston and came upon this sketch of his from fishing off the coast of Havana."

via:

[ed. From the comments: Big Game fishing and IGFA records were a thing in Hemingway’s time. I wonder if that relates to record-catch submissions? The drying part may be to sumbit proof of the catch/species to IGFA officials (without sending in rotting flesh)?]