He translated, or perhaps transcribed, the prophecies of Vegoia, which were kept in the archives of the Palatine Apollo;[6] one fragment of this work attributed to Tarquitius survives.
[3] Tarquitius has been regarded as the probable author of a conjectural bilingual Etrusco-Latin version of Etruscan writings that would have been in use by Latin authors ranging from Lucretius in the 1st century BC through Johannes Lydus (6th century AD) and perhaps Isidore of Seville (d. 636 AD).
[7] Based on the two preserved fragments, Tarquitius appears to have written in prose, but because a clausula can be scanned as a trimeter at the end of one, verse composition is not impossible.
[4] Pliny names Tarquitius as a source for the second book of his Natural History and associates him with Aulus Caecina,[5] who also wrote on Etruscan religion and who lived in the time of Julius Caesar.
As one indication that his books were still being used in late antiquity, the haruspices consulted Tarquitius under the title De rebus divinis ("On Divine Matters") before the battle that proved fatal to the emperor Julian — because he failed to heed them, according to Ammianus Marcellinus.