St. Margaret’s School in Tappahannock names Colley W. Bell III Head of School. Bell is the 13th person to hold the that role. He has more than three decades of experience with independent schools serving as a head of school, administrator, teacher, dorm parent, and coach. St. Margaret’s is an Episcopal all-girls boarding and day school for grades 8-12 and is celebrating its 100th year. Bell and his wife Edwina will reside on campus.