Our World in Words

The grid below contains the names of the following rivers in South America. Find them all to complete the puzzle!

Negro Tocantins Amazon Mapocho Paraguay Madeira Orinoco Arauca Magdalena Ene Uruguay Ucayali Napo Chubut Guaviare

Turn into author completed for free art, a chance to borrow one of his DVDs, or a random spoken phrase of his choosing.