Fleshed out tremendously from the original novel, Squire Trelawney is presented as a fiercely greedy individual–constantly plotting to cheat others out of their money and take everything for himself. For instance, as soon as the Hispaniola leaves on its voyage, Trelawney had arranged for Jim’s mother’s inn (and home) to be repossessed. He also spent the entire voyage making a copy of the treasure map without the guiding markings on it.

His greed becomes truly clear as the party reaches the island and gets closer to the treasure itself. As the other officers attempt to survive after the brutal mutiny, Trelawney insists on hunting for his treasure, becoming steadily more aggressive. When the gold is finally found, Trelawney is shown digging through it almost like an animal. He argues with Silver about whose right it is to take the treasure, displaying a very base fury that seems to shock even Silver:

“Squire Trelawney claims the treasure,” still, Treasure Island, part 2, 1:15:41