What is Antonio pigafeetas journal is an example of

Antonio Pigafetta (Italian: [anˈtɔnjo piɡaˈfetta]; c. 1491 - c. 1531) was an Italian scholar and explorer from the Republic of Venice. He traveled with the Portuguese explorer Ferdinand Magellan and his crew by order of the King Charles I of Spain on their voyage around the world. During the expedition, he served as Magellan's assistant and kept an accurate journal which later assisted him in translating the Cebuano language. It is the first recorded document concerning the language.