The Three Cities, Paris Volume V by Émile Zola

FOR some reason of his own Guillaume was bent upon witnessing the execution of Salvat. Pierre tried to dissuade him from doing so; and finding his efforts vain, became somewhat anxious. He accordingly resolved to spend the night at Montmartre, accompany his brother and watch over him. In former times, when engaged with Abbe Rose in charitable work in the Charonne district, he had learnt that the guillotine could be seen from the house where Mege, the Socialist deputy, resided at the corner of the Rue Merlin. He therefore offered himself as a guide. As the execution was to take place as soon as it should legally be daybreak, that is, about half-past four o'clock, the brothers did not go to bed but sat up in the workroom, feeling somewhat drowsy, and exchanging few words. Then as soon as two o'clock struck, they started off.

The night was beautifully serene and clear. The full moon, shining like a silver lamp in the cloudless, far-stretching heavens, threw a calm, dreamy light over the vague immensity of Paris, which was like some spell-bound city of sleep, so overcome by fatigue that not a murmur arose from it. It was as if beneath the soft radiance which spread over its roofs, its panting labour and its cries of suffering were lulled to repose until the dawn. Yet, in a far, out of the way district, dark work was even now progressing, a knife was being raised on high in order that a man might be killed.