[ At the last picture, Trahearne actually laughs. Well, it's more like a quiet chuckle, but it's the same sentiment nonetheless. It seems they had a great time together, despite--perhaps even because of--the effects. ]

A reasonable theory. Perhaps it has a more potent effect on smaller mammals or even insects, but only manifests as pigmentation in larger animals. [ He pauses to think. ]

I wonder if it would have the same effect on plants.

[ He. Himself. He is the plant. If that's his subtle suggestion that he would eat them to find out, that's it. His eyes drift upward in thought before he abruptly turns around and strides towards a shelf nearby. ]