During the interwar period of the twentieth century British historian Nicholas Hammond traversed the region and described Chameria as consisting of main settlements like Paramythia and Margariti. He also described the Chameria region as pertaining to the Thiamis river basin, covering the Margariti district and heading all the way down to coastal villages like Loutsa of the Acheron plain, which marked the most southernmost Albanian speaking settlement and the southern limit of Chameria. Pre-War Greek sources say that the coast of Chameria extended from the Acheron River to Butrint and the inland reaches east till the slopes of Mount Olytsikas (or Tomaros). The center of Chameria was considered to be Paramythia and other areas were Filiates, Parga and Margariti. In various Greek sources of the interwar era they also at times include the Greek speaking area to the east of Filiates within Chameria, while excluding the Albanian speaking area of Fanari known also as Prevezaniko. Throughout the interwar period, Chameria in official Greek government documents related to the area north of the Acheron river.