[1][2] He wrote an account in Latin of his experience, known as the Descriptio expeditionis Asiaticae Friderici ("Description of the Asian Expedition of Frederick"), covering the period from 1189 down to 21 June 1190.
[3] According to the Historia de expeditione Friderici imperatoris, which plagiarized his Descriptio, Tageno died at Tripoli in the autumn of 1190.
Furthermore, he probably had access to an early draft of the Historia de expeditione, meaning that their texts are not independent witnesses to the original Descriptio.
[1] A slightly different version of Tageno's Descriptio from that in Magnus appeared in a book published by the Bavarian humanist Johannes Aventinus in 1522.
The differences between the two versions of the Descriptio are largely stylistic and may reflect Aventinus emendation of the text in accordance with humanistic notions of Latinity.