No vampires over a thousand

The other Princes were even older than Paris–one looked like he might
be a thousand, though Larten knew that even vampires didn’t live that long–
but they moved easily and carried themselves proudly. Each would have to
fight like any ordinary vampire this night, and if one was found wanting, he
would not hold his post for long. Vampires had great respect for the elderly,
but only if they could account for themselves in battle. The weak or infirm
were expected to seek death as soon as possible.

***

The Saga of Larten Crepsley: Birth of a Killer, Chapter 17