From booktopia.com.au:
To the small village of Lindsay on Prince Edward Island comes Eric Marshall, a twenty-four-year-old substitute schoolmaster. Dark and handsome, the son of a wealthy merchant, Eric has a bright future in the family business and has taken the two-month teaching post only as a favor to a friend.

Then fate, which has been more than generous to Eric, throws in his path a beautiful, mysterious girl named Kilmeny Gordon. With jet-black hair and the face of a Renaissance Madonna, Kilmeny immediately captures the young man's heart. But she is mute, cannot speak, and Eric is concerned for and bewitched by this shy, sensitive, blue-eyed girl.

For the first time in his life, Eric must work hard for something he wants badly. And there is nothing he wants more than for Kilmeny to return his love.

Left at the book exchange.

Release #2 for the 2021 April Showers/May Flowers Challenge.