The herbs are easy to identify, and he makes a mental note of them. The lyrium, though... He takes a breath before nodding.

"Give me time on the lyrium. I'll need to gather the funds for a vial as I'm not certain I can justify using any of the Inquisition's lyrium for a personal project like this." This is about curiosity, and he's not sure it will help the Inquisition or the Wardens.