“These considerations,” resumed the Black, “led me to the conclusion that a wicked man’s thoughts could only be rendered available as a means to induce sincere repentance and excite a permanent remorse, by extending their train to a long, long period. If a night of a few short hours’ duration would produce a very partial and limited effect upon the mind of a criminal, I reasoned--why not make _a night_ of many weeks, and hope for a proportionately grand and striking result? Accordingly, I resolved to subject those six prisoners to the test; and I will now give you a detailed account of the consequences.” “Proceed,” said the physician: “I am becoming deeply interested.” “The six prisoners were each placed in a separate cell, and not allowed any light in the first instance,” continued the Blackamoor. “Each dungeon was plainly but comfortably furnished; and every evening they were supplied with a sufficiency of food for four-and-twenty hours. They were ordered to perform their ablutions regularly under pain of having their meat stopped; and you may be sure that they did not fail to obey the command. Twice a week the men were shaved by one of my people; and twice a week also they were supplied with clean linen. The woman was of course provided with additional changes; and as her health was more likely to suffer than that of the men, I allowed her to walk up and down the long subterranean for two hours each day, watched by Wilton so that she might not communicate with either of the prisoners. But I am now about to enter on details connected with each individual.” The physician drew his chair a little closer to the Black.