This is actually very interesting, and would be pretty cool to figure out what these messages say. However, I can barely make out all of the letters, so I doubt I'd be of any help. Definitely reminds me of the Zodiac case, which is pretty neat.
This guy had his own little language that only he used.
I wonder if he would have been any good at chess?
The eggplant (Solanum melongena) is a plant of the family Solanaceae (also known as the nightshades) and genus Solanum. It bears a fruit of the same name, commonly used in cooking.