Jean Valjean felt the pavement vanishing beneath his feet. He entered this slime. There was water on the surface, slime at the bottom. He must pass it. To retrace his steps was impossible. Marius was dying, and Jean Valjean exhausted. Besides, where was he to go? Jean Valjean advanced. Moreover, the pit seemed, for the first few steps, not to be very deep. But in proportion as he advanced, his feet plunged deeper. Soon he had the slime up to his calves and water above his knees. He walked on, raising Marius in his arms, as far above the water as he could. The mire now reached to his knees, and the water to his waist. He could no longer retreat. This mud, dense enough for one man, could not, obviously, uphold two. Marius and Jean Valjean would have stood a chance of extricating themselves singly. Jean Valjean continued to advance, supporting the dying man, who was, perhaps, a corpse.
- Les Miserables, Volume 5, Book 3, Chapter 6
This episode is the famous sewer escape scene.
You can obtain this from your standard anime torrent indexing sites.