The book "Philippine Islands, 1493-1898; Volume 49. Studies of early navigators, descriptions of the islands and their inhabitants, their history and records of Catholic missions as described in modern books and manuscripts, showing the political. This book is an important source of information on the history and culture of the Philippine Islands from 1493 to 1898. It details the expeditions of early explorers, their impressions of the islanders, Catholic missions, and historical events of the time. Readers will be able to better understand the development of this region thanks to the descriptions made by witnesses of those events and missionaries. The author helps to recreate the political and socio-cultural context in which the Philippines developed during this long period.