British surveyor John Gerard de Brahm, who mapped the coast of Florida in 1773, called the area "River Glades". The name "Everglades" first appeared on a map in 1823, although it was also spelled as "Ever Glades" as late as 1851.[5] The Seminole call it Pahokee, meaning "Grassy Water".[6] The region was labeled "Pa-hai-okee" on a U.S. military map from 1839, although it had earlier been called "Ever Glades" throughout the Second Seminole War.[4]