[ He bends over, breaking at the waist. Is it a low bow - or is he simply trying to get down to Ciel's level? ]

I beg your pardon, your Lordship. Unlike you, I am of no noble birth whatsoever. A mere servant.

Does the apology of a servant mean anything to an earl?

[ He'd looked sort of vaguely conciliatory. But now he grins. ]

If you want to drive the tank, I'll let you sit in my lap!