The Promise: Carson Series, Book 1

In 1746, ten-year-old Jonathan Rhodes lived a life of luxury with his father, mother and little brother. His constant companion was eight-year-old Colleen, whose widowed father had brought her and her little sister to live with them years earlier. Colleen could do anything a boy could do, including play tricks on the adults without getting caught. For that alone Johnathan greatly admired her.
 He assumed they would always be together, but when the king's men executed their fathers and another claimed his inheritance, his world began to crumble. His mother soon died, all four children were suddenly orphaned and then cruelly separated. 
For twelve years Johnathan remembered his promise to find Colleen, but when he finally did. he found his troubles had only just begun.