A pair of photographs are the only clues that Poirot has to solve the murder of a village charwoman, and to prove the innocence of the victim's lodger.
一句话评论：白璧微瑕。奥利弗阿姨扔的苹果核现在应该遍地苹果树了吧。动机or实操性。太逗了。《爱德华.巴纳德的堕落》和《杀人回忆》。
