Bear-leader

So!—you have really undertaken the delightful office of bear-leader—becauſe the brother of your Geraldine cannot take care of himſelf— […]

Source: wiktionary

My bear-leaders vvere conſiderably ſurpriſed vvith my firmneſs, but ſeemed to think it beneath them to conteſt vvith me the principles I delivered. […] They left me abruptly; having firſt ordered an old man, the father of the landlady, to ſtay in the room vvith me vvhile they vvere abſent.

Source: wiktionary

[…] Nick, if you please, was pronounced delicate, and led a series of tutors a fine dance until his mother decided he was old enough for the Grand Tour and sent him off with a bear-leader like some young regency lordling.

Source: wiktionary