Someone wrote that he wanted catnip, and I was not sure why he would want an herb, if it were not for putting in something.

[Herbs are for food, aren't they? Food, and tea, apparently. Temeraire isn't sure what else humans might use them for, although Ren and Shun seem to have a better understanding of the matter, and he's quite curious to hear what it may be.

As an afterthought, he adds:]

Is that a uniform you are wearing?