found:Col. gaz.(Dover, Strait of, Fr. Pas de Calais, anc. Fretum Gallicum, strait separating England from France and connecting English Channel with North Sea.)
found:Hyperdictionary, Dec. 1, 2003(Strait of Calais: the strait between the English Channel and the North Sea; synonyms: Pas-de-Calais, Strait of Dover)