Sir Garnet Wolseley's fears of a French invasion through the tunnel as
seen in the United States in 1882 by Puck.
Hector Horeau's tunnel scheme of 1851 involved laying
down a prefabricated submerged tube on the Channel bottom.
The pavilions are ventilating stations.
Thomé de Gamond's plan in 1856 for a Channel tunnel by way of the
Varne, which would be built up into an international harbor.
