[The reason Ciel is out strolling sans butler is probably because Sebastian's been running around more than usual today, taking care of his various duties and doing his many jobs (and also because Ciel probably wants some alone time every now and then and he'll be fine, if he stubs his toe he can just call for Sebastian).
Anyway, tl;dr version: some time later, the missing butler also passes by Hawke's tent. And while you'd think the eyeballs would catch his attention (they look a bit like they could belong to the pets Sebastian's kind keeps at home, how nostalgic. not that he's much for nostalgia), what he ends up focusing on is...]
My, but that is quite an impressive volume of cheese. [It can't possibly be edible anymore, why would you sell that.]