Who was Grandmother Morrison and what did she urge her children to do in their lives?

In the Prologue, Katie tells the reader about her Grandmother Morrison, who had a book rest fixed to her spinning wheel so she could read as she worked. It was Grandmother Morrison who recognized the importance of education and who urged each one of her children to finish school. Based on a portrait that always hung in her parents' bedroom, Katie believes that Matt is the one who most resembles Grandmother Morrison of herself and three siblings.