Herbmaster

[…] the herbmaster of the Houses of Healing in The Return of the King is descended from the “jabberwocks of historical and antiquarian research” in the British Academy lecture.

Biting the words back and swallowing them was harder than swallowing the vile concoctions of lunatic herbmasters, but she managed.

“And because of these facets of the craft, partial adepts can also sometimes be herbmistresses or herbmasters.”