Conversation so far:
What types of exploration happened before Vasco da Gama?
Exploration before Vasco da Gama included Portuguese expeditions organized by Prince Henry the Navigator had been reaching down the African coastline, principally in search of west African riches.
Were any riches found during the Portuguese expeditions organized by Prince Henry the Navigator had been reaching down the African coastline, principally in search of west African riches?
Portuguese expeditions organized by Prince Henry had greatly extended Portuguese maritime knowledge, but had little profit to show for the effort.

Question: What happened after Henry's death?
Self-contained rewrite: What happened after Henry's death in exploration before Vasco da Gama?