You would do well to hold your tongue, Mister Faustus. [ Ciel's words are sharp and authoritative. Also 'Faustus' is not a suspicious-sounding name at all! ] An insult to my butler is an insult the house of Phantomhive, which I will not tolerate. You, in return, also reflect poorly on your master by making such rude insinuations. Perhaps it is you who is not as capable as you seem to think.
[ Not getting off to a very good start here, Claude. ]