There's never been a faithful adaptation of Tarzan. I've mixed feelings about the Disney version. The knuckle walking Tarzan turns me off almost as much as monosyballic Tarzan does
The first book has a great final line:
Edgar Rice Burroughs wrote:
"If it's any of my business, how the devil did you ever get into that bally jungle?"
"I was born there," said Tarzan, quietly. "My mother was an Ape, and of course she couldn't tell me much about it. I never knew who my father was."
He says this to the man who he knows has taken his inheritance ( the Greystoke name ) and the woman he loves. ( Jane of course)