Harry is not immune to the full force of Severus' irate glare, but he's had enough experience to be somewhat inured to it. He's come along with a tin containing a few odds and ends that he's come across and while he can't get much use out of them, he recognizes their value in potion making.

"I wanted to say thank you, for letting me know about the new arrivals, and to see if any of this could be helpful." The 'this' in question is a collection of curios pilfered from the luxury ship that the Tranquility docked at some time ago - perfumes, dried spices, scraps of silk, a few pearls, and a single, slightly deformed nugget of gold.