He divined that one of his enemy's purposes was to secure the personal property, as well as the estate, to his son: or rather himself; yet why he did not wait till his decease was a puzzle to my master, because ignorant how nearly he and his nephew would quit the world together. 
He guessed that one of his enemy's purposes was to secure the property and the estate to his son: yet why Heathcliff did not wait till his death was a puzzle to my master, because he was ignorant of how nearly he and his nephew would quit the world together. 