ABSTRACT
IN tall towers on the shore and in the harbours of cities an abundant flame is kept alive, chiefly with a great number of candles in large lanterns set up in some high place. This is done in the autumn and winter on the shores of the North Sea and various parts of the Baltic1 through each successive night so that mariners may find the havens they are steering for with greater safety and convenience, for in some parts of these seas are found shores without havens, or rocks lurking below the surface, or high sand dunes driven together by the violence of gales, as I said above.2
