>>26042
Before Cabral.
It's possible Cabral's entire expedition to India was just a mask to actually find Brazil.
Portugal had been by that point, going up and down the African west coast for decades. Especially at the west African coast's turn east, around Cabo Verde, it's not unreasonable to think there were many instances of ships veering off course and going too far away into the west, due to storms or other factors.
At a certain point, you start to see evidence of a coast. Stuff like birds in the distance, debris, etc.
Now mind you, it's circumstantial. But it's certainly weird how it all lines up so perfectly. Before any official landfall in Brazil, Portugal already had signed a treaty where most of that coast was recognized as within their territory (at least by the Castillians).
Mind you, I'm Portuguese, so I got my biases.