Every fresh attack made them more suspicious and ferocious than before. From morning till night they were spying upon one another. Laurent barely set his foot outside the lodging in the arcade, and if, perchance, he did absent himself, Thérèse never failed to accompany him. Their suspicions, their fright lest either should confess, brought them together, united them in atrocious intimacy. Never, since their marriage, had they lived so tightly tied together, and never had they experienced such suffering. But, notwithstanding the anguish they imposed on themselves, they never took their eyes off one another. They preferred to endure the most excruciating pain, rather than separate for an hour. If Thérèse went down to the shop, Laurent followed, afraid that she might talk to a customer; if Laurent stood in the doorway, observing the people passing through the arcade, Thérèse placed herself beside him to see that he did not speak to anyone. When the guests were assembled on Thursday evenings, the murderers addressed supplicating glances to each other, listening to one another in terror, one accomplice expecting the other to make some confession, and giving an involving interpretation to sentences only just commenced. Such a state of warfare could not continue any longer. Thérèse and Laurent had both reached the point of pondering on the advisability of extricating themselves from the consequences of their first crime, by committing a second. It became absolutely necessary that one of them should disappear so that the other might enjoy some repose. This reflection came to them both at the same time; both felt the urgent necessity for a separation, and both desired that it should be eternal. The murder that now occurred to their minds, seemed to them natural, fatal and forcibly brought about by the murder of Camille. They did not even turn the matter over in their heads but welcomed the idea as the only means of safety. Laurent determined he would kill Thérèse because she stood in his way, because she might ruin him by a word, and because she caused him unbearable suffering. Thérèse made up her mind that she would kill Laurent, for the same reasons. The firm resolution to commit another murder somewhat calmed them. They formed their plans. But in that respect they acted with feverish excitement, and without any display of excessive prudence. They only thought vaguely of the probable consequences of a murder committed without flight and immunity being ensured. They felt the invincible necessity to kill one another, and yielded to this necessity like furious brutes. They would not have exposed themselves for their first crime, which they had so cleverly concealed, and yet they risked the guillotine, in committing a second, which they did not even attempt to hide.