This Latin-language text chronicles the apostolic work of Antonius Sepp, a Jesuit missionary who served in what is now Paraguay during the late 17th century. Sepp's letters and accounts of his experiences provide a first-hand look at the challenges and triumphs of evangelizing in a distant and unfamiliar land. The text also sheds light on the early history of the Jesuit order and their missionary efforts in the New World. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.