Levi and Ezra Bartlett papers 1776-1826 (bulk 1811-1826)
William Dunbar (1749-1810) was born in Scotland and emigrated to North America in 1771. After arriving in Philadelphia, he traveled south to Mississippi and Louisiana, where he established plantations with Scottish merchant John Ross near present-day Baton Rouge and Natchez. Dunbar became surveyor general for the Natchez District of Spanish West Florida before 1798. He spent most of his later years as a naturalist. At the urging of President Thomas Jefferson, Dunbar led government-funded expeditions to the western boundaries of the Louisiana Territory in 1804-1805.
Valentine Layssard, son of French immigrant Dr. Ennemond Meullion (1737-1820), served as the surveyor and commandant in Rapides Parish, Louisiana, from 1795-1798.
Carlos Trudeau (ca. 1750-1816) served as a surveyor-general of Spanish Louisiana in the late 18th and early 19th centuries.