Madame Grandier

In the short story The Erymanthian Boar, Madame Grandier is a fellow guest of Herule Poirot at the Swiss mountaintop resort of Rochers Neiges. According to the hotel manager, Madame Grandier's husband had died while climbing some three years previously. Since that time, she had made a yearly trip to the hotel as a form of sacred pilgrimage.