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Accounts of voyage

Antonio Pigafetta 's journal, later published as Relazione del primo viaggio intorno al mondo, is the main primary source for much of what is known about Magellan's expedition. The first published report of the circumnavigation was a letter written by Maximilianus Transylvanus, a relative of sponsor Cristóbal de Haro, who interviewed survivors in 1522 and published his account in 1523 under the title De Moluccis Insulis.... Initially published in Latin, other editions later appeared in Italian, Spanish, and English.

In addition, there is an extant chronicle from Peter Martyr d'Anghiera, which was written in Spanish in 1522 or 1523, misplaced, then published again in 1530.

Another reliable secondary source is the 1601 chronicle and the longer 1615 version, both by Spanish historian Antonio de Herrera y Tordesillas. Herrera's account is all the more accurate as he had access to Spanish and Portuguese sources that are nowhere to be found today, not least Andrés de San Martín 's navigational notes and papers. San Martin, the chief pilot-cosmographer (astrologer) of the Armada, disappeared in the Cebu massacre on 1 May 1521.

In addition to Pigafetta's surviving journal, 11 other crew members kept written accounts of the voyage: