Ayamonte was assigned to Victoria, the nao that rounded the world, receiving the monthly pay of eight hundred (800) maravedis, as revealed in the study of José Toribio Medina, the Chilean historian, who consulted the records of the Casa de Contratacíon de las Indias, operating arm of Spain's Supreme Council of the Indies with headquarters at Seville.
Ayamonte together with a cabin boy, Bartolomé de Saldaña, deserted the Victoria one night on February 5, 1521 as the ship was laid off at the port of Batatara, at the north shore of Timor.
Medina cites Gonzalo Fernández de Oviedo as source for the story a number of the men were executed at Timor for participating in a mutiny.
It was recently republished in modern Portuguese in a book, Fernão de Magalhães, A primeira viagem à volta do mundo contada pelos que nela participaram, edited with notes by Neves Águas: Portugal, 1986.
The other eyewitness accounts in this category is by Antonio Pigafetta, Ginés de Mafra, Francisco Albo, and The Genoese Pilot.
The most important of these is the one by de Mafra principally because he was able to go back to Mazaua with probably some 90+ companions in March 1543 staying in the port for about six months.
Furthermore, there is the added probability, these were shared by Andrés de San Martín, the chief pilot-astrologer of the fleet, who was some kind of genius in the determination of longitude through mathematical calculation of using conjunctions of the moon with the planets.
Combés's other source, the secondary account by Antonio de Herrera y Tordesillas, states the name of the port was "Mazagua" the Hispanicized spelling of "Mazaua"—the gu has the value of w which is absent in the Spanish alphabet.
He is first fully accounted for in the research finding of Vicente Calibo de Jesus in a paper read before the Society for the History of Discoveries held on October 13, 2000 at the U.S. Library of Congress, Washington DC, U.S.A.