He wrote about "stout Cortez" staring at the Pacific Ocen from a peak in Darien.Perhaps Cortez was as stout as Shade, but it was Balboa who came across the Pacific Ocean.

 

[Certain scholars argue that Keats choose Cortez  to create a juxtaposition to Chapman's  translation of Homer, who only delights him when Chapman's translation makes his Odyssey available to him. Cortez conquered Mexico and this may brings to our minds the Aztecs, whose civilization could be compared with the ancient Greek culture. Other studious ask why, other than the rhyme scheme, did Keats select Darien, an area of Panama settled by the Scots in the seventeenth century...]