Following this, the English made no attempt to settle any higher than Henricus (in modern Chesterfield County), which lasted from 1611 until the Indian massacre of 1622. Following the Second Anglo-Powhatan War of 1644–45, the Powhatan tribes signed a peace treaty in 1646 ceding the settlers all territory below the Fall Line, from the Blackwater River to the York River. At this time, the colony built Fort Charles at the falls of the James, near where the legal frontier was for over half a century. After two years, the site of Fort Charles was relocated to "Manastoh" on the South Side of the river (later known as Manchester, Virginia), where the ground was considered slightly more fertile.