caesis Hirtio et Pansa, sive hostis illos, seu Pansam venenum vulneri adfusum, sui milites Hirtium et machinator doli Caesar abstu
Translation :
when Hirtius and Pansa were slain—whether they were destroyed by the enemy, or Pansa by poison infused into a wound, Hirtius by his own soldiers and Cæsar's treacherous machinations
Edition :
Annales ab excessu divi Augusti. Cornelius Tacitus. Charles Dennis Fisher. Clarendon Press. Oxford. 1906.
Complete Works of Tacitus. Tacitus. Alfred John Church. William Jackson Brodribb. Sara Bryant. edited for Perseus. New York. : Random House, Inc. Random House, Inc. reprinted 1942.