One big information gap in this book.

   As I've already written, Cathy, Heatcliff's  love (love of whole his life), chose another man... But she did not tell it to him, Heatcliff  overheard her conversation with Nelly Din. Of course, it was a shock for him, because Cathy was sole darling and close  man in this odd house. So,  Heatcliff  disappeared. Nobody knew where but everybody understood why. He lived somewhere for 3 years.
   And it was a big white spot in this book. The author did it purposely to give us food for our brains. We could only  know  that he became a very rich and influential man with excellent manners (which we couldn't observe before). His speech became intelligent, his appearance changed to the best side.
   So, the main question  "Where did  Heatcliff live and what did he do? "
remain unanswered for us. In my opinion, the main character could be successful in military career because it was mentioned in the text that his muscles became more and more full-blown and his bearing became straight. And also he could study somewhere and associate with different intelligent people because his speech became richer. As for his wealth, he could acquired it with the help of his own business, for example he could sell slaves ( as we know such kind a man, he really could do it).
   Another people in our group have also read this book and I hope they'll want to tell us their own estimates.