The last town in colonial Connecticut to be settled. Colebrook was named after a town in Devonshire, England. The reason is now unknown. The year 1765 saw Benjamin Horton, leader of a trickle of settlers, arrive amid virgin forests. Samuel Rockwell, among those who shortly followed two years afterward, built one of the outpost's first houses. Here before long was born Colebrook's first child, a boy who parents fittingly named him Alpha.