Victor Hugo,
Les Misérables — Volume 5, Book Third…
“ Fatigue began to gain on him; and as his strength decreased, it made the weight of his burden increase. Marius, who was, perhaps, dead, weighed him down as inert bodies weigh. Jean Valjean held him in such a manner that his chest was not oppressed, and so that respiration could proceed as well as possible. Between his legs he felt the rapid gliding of the rats. One of them was frightened to such a degree that he bit him. From time to time, a breath of fresh air reached him through the vent-holes of the mouths of the sewer, and re-animated him. ”
