Who is Adam Shockley from Sarum: The Novel of England and what is their importance?

Adam Shockley is Samuel Shockley's grandson. His father is Jonathon. Adam lived in Sarum during the 18th century, He served in England's military, accepting commissions in India, the West Indies and America. Upon he return to Sarum, he marries Mary Mason. The couple soon leaves England and emigrates to the United States.