Gadsden, (1) Christopher (1724-1805). was born at Charleston in South Carolina, United States, and, after being educated in England, became a merchant in Philadelphia. He was a member (1774) of the first Congress, and during the war became brigadier-general and lieutenant-governor of South Carolina, and was for a time prisoner in the hands of the British. (2) James, grandson of the above (1788-1858), was born at Charleston, and served in the war against the British in 1812 and against the Indians. His name was given to a portion of territory which, under a treaty negotiated by him, the Government bought in what are now Arizona and New Mexico.