79. Ada tells of having found a cryptic diagram, marked with symbols, in the lower hall near the library door.
80. On the day of Rex's murder Von Blon reports that his medicine-case has been rifled of three grains of strychnine and six grains of morphine—presumably at the Greene mansion.
81. The library reveals the fact that some one has been in the habit of going there and reading by candle-light. The books that show signs of having been read are: a handbook of the criminal sciences, two works on toxicology, and two treatises on hysterical paralysis and sleep-walking.
82. The visitor to the library is some one who understands German well, for three of the books that have been read are in German.
83. The galoshes that disappeared from the linen-closet on the night of Rex's murder are found in the library.
84. Some one listens at the door while the library is being inspected.
85. Ada reports that she saw Mrs. Greene walking in the lower hall the night before.
86. Von Blon asserts that Mrs. Greene's paralysis is of a nature that makes movement a physical impossibility.
87. Arrangements are made with Von Blon to have Doctor Oppenheimer examine Mrs. Greene.
88. Von Blon informs Mrs. Greene of the proposed examination, which he has scheduled for the following day.
89. Mrs. Greene is poisoned before Doctor Oppenheimer's examination can be made.
90. The post mortem reveals conclusively that Mrs. Greene's leg muscles were so atrophied that she could not have walked.
91. Ada, when told of the autopsy, insists that she saw her mother's shawl about the figure in the hall, and, on being pressed, admits that Sibella sometimes wore it.
92. During the questioning of Ada regarding the shawl Mrs. Mannheim suggests that it was she herself whom Ada saw in the hall.
93. When Julia and Ada were shot there were, or could have been, present in the house: Chester, Sibella,