The suggestion had come from the minister himself. It was, whichever way one looked at it, a fortunate not to say perfect idea, both from the point of view of the merely sanitary aspects of the case and from that of the social implications and their political consequences. Until the causes were established, or, to use the appropriate terms, the etiology of the white evil, as, thanks to the inspiration of an imaginative assessor, this unpleasant-sounding blindness came to be called, until such time as treatment and a cure might be found, and perhaps a vaccine that might prevent the appearance of any cases in the future, all the people who had turned blind, as well as those who had been in physical contact or in any way close to these patients, should be rounded up and isolated so as to avoid any further cases of contagion, which, once confirmed, would multiply more or less according to what is mathematically referred to as a compound ratio. Quod erat demonstrandum, concluded the Minister. According to the ancient practice, inherited from the time of cholera and yellow fever, when ships that were contaminated or suspected of carrying infection had to remain out at sea for forty days, and in words within the grasp of the general public, it was a matter of putting all these people into quarantine, until further notice. These very words, Until further notice, apparently deliberate, but, in fact, enigmatic since he could not think of any others, were pronounced by the Minister, who later clarified his thinking, I meant that this could as easily mean forty days as forty weeks, or forty months, or forty years, the important thing is that they should stay in quarantine. Now we have to decide where we are going to put them, Minister, said the President of the Commission of Logistics and Security set up rapidly for the purpose and responsible for the transportation, isolation and supervision of the patients, What immediate facilities are available, the Minister wanted to know, We have a mental hospital standing empty until we decide what to do with it, several military installations which are no longer being used because of the recent restructuring of the army, a building designed for a trade fair that is nearing completion, and there is even, although no one has been able to explain why, a supermarket about to go into liquidation, In your opinion, which of these buildings would best suit our purpose, The barracks offer the greatest security, Naturally, There is, however, one drawback, the size of the place is likely to make it both difficult and costly to keep an eye on those interned, Yes, I can see that, As for the supermarket, we would probably run up against various legal obstacles, legal matters that would have to be taken into account, And what about the building for the trade fair, That's the one site I think we should ignore, Minister, Why, Industry wouldn't like it, millions have been invested in the project, So that leaves the mental hospital, Yes, Minister, the mental hospital, Well then, let's opt for the mental hospital, Besides, to all appearances, it's the place that offers the best facilities because not only does it have a perimeter wall, it also has the advantage of having two separate wings, one to be used for those who are actually blind, the other for those suspected of having the disease, as well as a central area which will serve, as it were, as a no man's land, through which those who turn blind will pass to join those who are already blind, There might be a problem, What is that, Minister, We shall find ourselves obliged to put staff there to supervise the transfers, and I doubt whether we will be able to count on volunteers, I doubt whether that will be necessary, Minister, Why, Should anyone suspected of infection turn blind, as will naturally happen sooner or later, you may be sure, Minister, that the others who still have their sight, will turn him out at once, You're right, Just as they would not allow in any blind person who suddenly felt like changing places, Good thinking, Thank you, Minister, may I give orders to proceed, Yes, you have carte blanche.