Historedia
Person

Charles Mason

Events
1
Episodes
4
Years
1763–1767

Every event in Historedia whose sources name Charles Mason, with the role they cite and all of that event’s episodes. This is not a biography, and mentions are grouped by name, so two people with the same name can share this page.

Events and episodes

  1. Completion of the Mason–Dixon Line survey

    1763–1767

    Role: English astronomer and surveyor, co-surveyor of the line

    1. 1763–1767 · Delaware's southern boundary (Transpeninsular Line)Confirmation of Delaware's southern boundary

      As part of the commission, Mason and Dixon confirmed the earlier survey delineating Delaware's southern boundary from the Atlantic Ocean to the Middle Point stone.

    2. Summer 1767 · Monongahela River and Great Catawba War PathCrossing the Monongahela and the Great Catawba War Path

      In the summer of 1767 the surveying party crossed the Monongahela River and the Great Catawba War Path, violating a treaty limiting westward expansion of English settlements.

    3. October 1767 · Dunkard Creek near Mount Morris, PennsylvaniaHalt at Dunkard Creek

      In October 1767 the surveying party's Iroquois guides refused to proceed west of Dunkard Creek, near Mount Morris, having reached the border of their lands with the Lenape.

    4. 19 October 1767 · Mason and Dixon Survey Terminal Point, about 31 miles east of Pennsylvania's southwest cornerCompletion of the Mason–Dixon Line survey

      Mason and Dixon finished surveying the Pennsylvania–Maryland boundary in October 1767, ending a four-year effort commissioned to settle the Cresap's War border conflict.

Sources

  1. Charles Mason Wikipedia, revision of 2026-09-05
  2. Mason–Dixon line Wikipedia, revision of 2026-08-29