Considering the number of bottles in this village, the Witherbarks must deem it very important. Perhaps an apothecary in nearby Tarren Mill would like a sample.
Progress:
Apothecary Lydon: Hello, gentle shaman. The day has been long and not a single experiment successful...I hope you bring good news to me.
Completion:
Apothecary Lydon: Ah, and what is this? It appears to be venom... from some arachnoid creature I deem. And where did you get it?