Dover The Port of Dover provides much of the town's employment, as does tourism. First recorded in its Latinised form of "Portus Dubris", the name derives from the Brythonic word for waters ("dwfr" in Middle Welsh. The same element is present in the town's French ("Douvres") and Modern Welsh ("Dofr") forms (though the modern Welsh name is in fact a borrowing from, and an adaptation of, the English name Dover), as well as the name of the river Dour and is evident in other English towns such as Wendover. The current name was in use at least by the time of
Roman numerals die) are known as a quincunx, from the name of the Roman fraction/coin. The Latin words ' and ' are the source of the English words "sextant" and "quadrant". Other Roman fractional notations included the following: A number of systems were developed for the expression of larger numbers that cannot be conveniently expressed using the normal seven letter symbols of conventional Roman numerals. One of these was the "apostrophus", in which 500 (usually written as "") was written as |, while 1,000, was written as | instead of "". This is a system of encasing numbers to denote thousands (imagine