It is widely held that Gerasimov was the Russian translator of the Maximilianus Transylvanus' Letter on Magellan voyage.
The description of present-day Limasawa does not fit the geologic, geographic, geomorphologic, archaeologic, histriographic categories of Mazaua as described and explained in the eyewitness chronicles of Antonio Pigafetta, Ginés de Mafra, Francisco Albo, The Genoese Pilot, Martín de Ayamonte, as well as the secondhand accounts of Antonio de Brito, Andrés de San Martín, Antonio de Herrera y Tordesillas, and Maximilianus Transylvanus.