Robert Barr,
The Face and the Mask
“ Once this condition of things prevailed, nothing could clear London but a breeze of wind from any direction. London frequently had a seven days’ fog, and sometimes a seven days’ calm, but these two conditions never coincided until the last year of the last century. The coincidence, as everyone knows, meant death—death so wholesale that no war the earth has ever seen left such slaughter behind it. To understand the situation, one has only to imagine the fog as taking the place of the ashes at Pompeii, and the coal-smoke as being the lava that covered it. ”
