The Mosquito Coast was generally defined as the domain of the Mosquito or Miskito Kingdom and expanded or contracted with that domain. During the 19th century, the question of the kingdom's borders was a serious issue of international diplomacy between Britain, the United States, Nicaragua, and Honduras. Conflicting claims regarding both the kingdom's extent and arguable nonexistence were pursued in diplomatic exchanges. The British and Miskito definition applied to the whole eastern seaboard of Nicaragua and even to La Mosquitia in Honduras: i.e., the coast region as far west as the Río Negro or Tinto. The Mosquito Coast in the later part of the century came to be considered as the narrow strip of territory, fronting the Caribbean Sea and extending from about 11°45′ to 14°10′ N. It stretched inland for an average distance of , and measured about from north to south. In the north, its boundary skirted the Wawa River; in the west, it corresponded with the eastern limit of the Nicaraguan highlands; in the south, it followed the Río Rama. The chief modern towns are Bluefields, the largest town and capital of Nicaragua's South Caribbean Coast Autonomous Region; Magdala on Pearl Cay; Prinzapolka on the river of that name; Wounta near the mouth of the Kukalaya; and Karata near the mouth of the Coco River.