The Prophet's Mantle by Edith Nesbit

It seemed a very long walk home to Alice Hatfield, after that Sunday evening lecture. She felt almost as though she could never reach her lodging. It was such weary work to keep putting one tired foot before the other. And somehow she was so much more easily tired now than she used to be in her Derbyshire home, where she had been used to breast the steepest hills without even a quickened breath. She wished she had not gone; she had derived no pleasure from the evening, and had only gained a sharper heartache from the sight of a certain face, which had been, and was still for that matter, the dearest face in the world to her. She felt re-awakened too in her a liking for a different life among different surroundings; the life she had given up of her own free will three months ago.

She had been much alone in that other life, it is true, and her thoughts had not made solitude sweet; but she had seen _him_ sometimes, and now she was quite alone -- always -- save for the few slight acquaintances she had made in the house where she lived. In that other life, which now looked brighter than it had ever done when it was hers, she had been racked and tortured by her conscience, which had at last forced her to try and silence it by renouncing what she had sacrificed everything to gain, and by voluntarily adopting this strange, hard way of living. But now that that gloomy monitor was on her side, it failed to give that comfort and support which one is taught to expect from it.