"a young booby squire"
Blue-footed Booby
Creative Commons Attribution Share AlikeBlue-footed Booby - Credit: Pete

A booby is a tropical sea bird, related to the gannet.  The name was possibly based on the Spanish slang bubie, meaning dunce, as these tame birds had a habit of landing on board sailing ships, where they were easily captured and eaten.

Applied to a person, ‘booby’ indicates stupidity.