original: Finished by AD 8, possibly published posthumously.
simplifications: It was completed by AD 8, possibly published posthumously. Done by AD 8, possibly issued after death. Finished by AD 8, and published after his death. It was finished in AD 8. It's possible it was published after death. Finished by AD 8, possibly published after death. It was done by AD 8. It may have been published after death. It was finished by 8 AD. It may have been published after his death. It was finished in AD 8 and was possibly published after the author's death. It was finished by AD 8 and possibly published posthumously. Finished by AD 8, possibly published after death.