This HaBO comes from M, who is looking for this older title:
I probably read this in the early 90s. The leading characters have known each other since childhood. The heroine’s widowed (I think) mother became the tutor for the young master of the house ( I think his name was Miles). Heroine was allowed to study alongside him. Miles tormented the heroine by doing matters like dipping braids in ink etc.
There is a Jacobite treasure that is ultimately found including a pearl pin that looks like a gargoyle. Miles recognizes it and realizes his father was a traitor to the crown and donated the pin to help fund Prince Charlie.
Thanks for any help you can give.
Can we place this one?