Conversation so far:
What was the Conquistador?
Pedro de los Rios, the Governor of Panama, made an effort to recall Pizarro, but the conquistador resisted and remained in the south.
Why did they resist?
Reports of Peru's riches and Cortes's success in Mexico tantalized Pizarro.
How long did he stay there?
He undertook two expeditions to conquer the Incan Empire in 1524 and in 1526.
Both failed as a result of native hostilities, bad weather and lack of provisions.
Did he set out to try again?
This discovery gave Pizarro the motivation to plan a third expedition to conquer the area.

Question: What discovery motivated him?
Self-contained rewrite: What discovery motivated Francisco Pizarro to plan a third expedition?