Where can I find the white gull recipe? (The Witcher 3: Wild Hunt)

Also, where do you find recipes? It's just that I have a lot of improved and excellent recipes, but no basic ones ... And the merchants don't have them.

What is an elk anyway? Maybe white honey?

Scopolamine
No, it's a magical component for creating eliks, bombs, etc. Found in a cave in the square where to catch a witch (there is still an entrance with a barrier) + also got caught in Alexander's laboratory

I took it from some monster on witcher orders

White Gull is an alcohol base (not an elixir). The recipe can be found apparently in the prologue at the herbalist.