Book "Philippine Islands, 1493-1898. Volume 06 of 55. 1583-1588. Explorations by Early Navigators, Description of the Islands and Their Inhabitants, Their History and Records of Catholic Missions as Presented in Contemporary Books and Manuscripts Showing..." — is a research work that deepens our understanding of the early history of the Philippine Islands. The authors, using modern sources and documents, reveal the important events that took place in the period from 1583 to 1588 in these territories. Through the prism of contemporary descriptions and testimonies, the reader goes deeper into the world of Catholic missions, understands the atmosphere and relationships between the missionaries and the local population. This book will be a valuable resource for historians and anyone interested in the culture and activities of the early Philippine Islands.