The physical feature the proclamation line follow was "past a line sketched along the Appalachian Mountains".
Explanation:
The King George III enacted "the Royal Proclamation at 1763 on October 7", regarding the merger of French territories from North America by Great Britain, soon after the conclusion of the France and India War or the Seven Years War, which forbidden all settlements, past a line was sketched along the Appalachian Mountains. This 'No Trespassing' symbol was recognized as the 1763 Line of Proclamation. The act was done to reduce further tensions among settlers and Native American citizens.
