question on Carribain Pirates

We knew the lord barbet had won the cannon combat with David Jones, conversely David Jones lost, when the end of that combat, lord barket said that nothing left. So my question raise why lord barket took so much trouble to combat with David Jones why he didn't telling him the hart was in his hand?
The another question about kraken is how did kraken die?

what the hell in gods name of earth are you going on about?

I really and seriously dig that British girl too but for real what are you trying to say?