The Monomaniac by Émile Zola

Three months later, on a warm June night, Jacques was driving the Havre express that had left Paris at 6.30. His engine, No. 608, was quite new, and he began to know it thoroughly. It was not easy to handle, being restive and capricious, after the manner of those young nags which require to be broken in by hard work before they take kindly to harness. He often swore at it, and regretted La Lison. Moreover, he had to watch this new locomotive very closely, and to constantly keep his hand on the reversing-wheel. But on this particular night the sky was so delightfully serene, that he felt inclined to be indulgent, and allowed the engine to travel along as it would, while he found enjoyment in inhaling great draughts of fresh air. Never had he been blessed with such splendid health. He was untroubled with remorse, and presented the appearance of a man relieved of anxiety, and who was perfectly tranquil and happy.

He who, as a rule, never spoke on the journey, began to joke with Pecqueux, whom the management had left with him as fireman.