[Alucard is game enough to follow, keeping pace and careful to keep his eyes ahead, only looking back to Billie every so often. This all ought to look casual, and it helps to not be looking too bothered by what's being said.]

Recent being the key word. There could also be public and private registers. I've known it to happen.

[But that's for rare art and books and objects, not government bodies.]

Unique here sounding particularly dangerous. What's unique about them?