The harbour of Casco Bay and islands adjacent nautical chart

For many years English settlers in coastal Maine were targets for attack by the French-backed Abenaki and other indigenous groups. Consequently, Southack made many trips to Casco Bay, including one in 1702, when as captain of the Province Galley he raised a siege of Fort Casco. During these visits he assembled an impressive body of knowledge reflected in the detailed geography and soundings on this chart.
Courtesy of Boston Public Library