"What should we do, Le Chien?" Flat muttered, his tone turning grave.
In response to his uncharacteristic weakness, a strong response came back.
...you're not really in a position to be worrying about others though, are you?
"Huh?!"
The sound that called out to him was obviously not a normal voice.
While the voice might have been an accurate description of it, it was obviously not a
sound produced by any human vocal cords.

The Case Files of Lord El-Melloi II, Volume 3, Chapter 2, Part 3