[Any other day Sebastian would likely have caught the jar before it bounced. Now he collects it from the floor, at least, and decides to hold onto it until the young master tires of throwing things.]
Have I not been by your side prior to your arriving here?
[If so, that's certainly concerning and not how this supposedly works. Most likely, though, Ciel is speaking of the here and now, Sebastian realises, and he shakes his head and continues:]
Whoever or whatever is responsible for all this, they have managed to remain elusive. I have not yet had a chance to give them the appropriate greeting.