[Horatio is clearly unconcerned by the scowl. He has Scorpius's attention, and that was his first objective here.]

As well as it could, in a place that brooks no roots.

[He bows a low, flourishing bow, and sits as invited.]

You've laid a lovely table, Sir. Most befitting to the import of your guest, I feel.

[Yes he's sort of complimenting Scorpius, but mainly still himself.]