The tunnel seems always to have had a capacity to arouse in its proponents a peculiarly passionate and unquenchable enthusiasm. Men have devoted their adult lives to promoting the cause of the tunnel, and such a powerful grip does the project seem to have had on the imagination of its various designers that just to look at some of their old drawings—depicting, for example, down to the finest detail of architectural ornamentation, ventilation stations for the tunnel sticking out of the surface of the Channel as ships sail gracefully about nearby—one might almost think that the tunnel was an accomplished reality, and the artist merely a conscientious reporter of an existing scene. Such is the minute detail in which the tunnel has been designed by various people that eighty-six years ago the French Assembly approved a tunnel bill that specified the price of railway tickets for the Channel-tunnel journey, and even contained a clause requiring second-class carriages to be provided with stuffed seats rather than the harder accommodations provided for third-class passengers. And an Englishman called William Collard, who died in 1943, after occupying himself for thirty years with the problem of the Channel tunnel, in 1928 wrote and published a book on the subject that went so far as to work out a time-table for Channel-tunnel trains between Paris and London, complete with train and platform numbers and arrival and departure times at intermediate stations in Kent and northern France. As for the actual engineering details, a Channel tunnel has been the subject of studies that have ranged from collections of mere rough guesses to the most elaborate engineering, geological, and hydrographic surveys carried out by highly competent civil-engineering companies. Interestingly enough, ever since the days, a century or so ago, when practical Victorian engineers began taking up the problem, the technical feasibility of constructing a tunnel under the Channel has never really been seriously questioned. Yet, despite effort piled on effort and campaign mounted on campaign, over all the years, by engineers, politicians, and promoters, nobody has quite been able to push the project through. Up to now, every time the proponents of a tunnel have tried to advance the scheme, they have encountered a difficulty harder to understand, harder to identify, and, indeed, harder to break through than any rock stratum.