《愛妻》(Tape-Measure Murder) 《模範女傭》(The Case of the Perfect Maid) 《守門婦之謎》(The Case of theCaretaker) 《三樓奇案》(The Third Floor Flat) 《小強尼歷險記》(The Adventure of Johnnie Waverly)
Caretaker stores mementos of the objects and // provides operations to retrieve them. var Caretaker = {// Namespace: Caretaker mementos : [], // The mementos