For his services to the Crown (allegedly as a privateer), he initially received a 600-acre (2.4 km2) land grant in Louisiana, near present-day St. Francisville.
He named the main plantation in present-day Wilkinson County near Natchez, Mississippi, Northumberland Place in honor of supposed ties with the fabled British Percy lineage of Hotspur.
[4] Courthouse records, newspaper articles and history books show that in the 21st century, the bulk of the estate inherited through succeeding generations of Charles Percy is today owned by Anton Robert Williams of Kalamazoo, Michigan and Grand Rapids, Michigan through his trust and holding company[5][6] His son, Thomas George Percy, Sr. (Princeton 1806), wed Maria Pope, (a relative of the British poet Alexander Pope) in 1814.
Maria's sister Matilda wed John Williams Walker, a Princeton University graduate and one of Alabama's first two senators.
The sons of Thomas George Percy helped develop the Mississippi Delta into the leading cotton-producing area in the world.