"When such is the condition of night, if you wish to re¬present a scene therein, you must arrange to introduce a great fire there, and then the things which are nearest to the fire will be more deeply tinged with its colour, for whatever is nearest to the object partakes most fully of its nature; and making the fire of a reddish colour you should represent all the things illuminated by it as being also of a ruddy hue, while those which are farther away from the fire should be dyed more deeply with the black colour of the night."