Saint Veronica's Kerchief by Selma Lagerlof

This is how the old woman came to live in the vine-dresser's hut. And she conceived a great friendship for the young people. But for all that she never told them whence she had come, or who she was, and they understood that she would not have taken it in good part had they questioned her.

But one evening, when the day's work was done, and all three sat on the big, flat rock which lay before the entrance, and partook of their evening meal, they saw an old man coming up the path.