But during the Marquis of Pombal government in Portugal, Durão was persecuted and left Portugal for Rome, where he worked as a librarian for more than 20 years. He also visited both Spain and France during this time. When Pombal's government fell, he returned to Portugal, where he returned to teaching at the University of Coimbra. He lived there for the rest of his life.
Although he never returned to Brazil, his epic Caramuru was his remembrance of his native land.
The framing story of the poem is that of the shipwrecked Portuguese sailor Diogo Álvares Correia (Caramuru, or dragon from the sea) who became the patriarch of a large half-caste community and the founder of Bahia through his Indian wives. It was the custom for the conquering tribesmen to attempt to retain the strength of their vanquished, but worthy, foes. This was done by offering him a "widow" with whom to bear children and then by the ritualistic ingesting of his flesh. Diogo Álvares was not immediately eaten because of injuries he suffered in the shipwreck. He asked for and was granted permission to swim out to the still-visible ship to retrieve a crutch. The crutch he brought back was a blunderbuss, which, when he displayed its fire power, earned him not one but several wives and eventually the leadership of the community.