[3] In 1766 they left the fort and went to the river Napo, facing the difficulties of communication with the Papal Post Office and the tropical climate.

[4] New expeditions followed when Colonel Joaquim Tinoco Valente, governor of the Grão-Pará and Rio Negro, became captain; João Pereira Caldas, who was also military, was Xavier de Sampaio's spokesman.

On October 1, 1777, Portugal and Spain reinstated restrictions in the South American colonies, keeping the 1777 Treaty of Saint Idelfonso in force.

The village was reborn between 1774 and 1775 by a Lord called Sampaio, who gathered with him the indians of the Caiuvicenas, Passés and Tikunas tribes.

[6] In 2017, Tonantins was featured in the television show 90 Day Fiancé as the hometown of Karine Martins, one of the cast members.