The difficult theme of coincidental collective hallucinations, as when two or more people at once have, or profess to have, the same false perception of a person who is really absent and dying, is next disposed of by Herr Parish. The same _points de repère_, the same sound, or flicker of light, or arrangement of shadow, may beget the same or a similar false perception in two or more people at once. Thus two girls, in different rooms, are looking out on different parts of the hall in their house. 'Both heard, at the same time, an [objective?] noise' (p. 313). Then, says Herr Parish, '_the one sister saw her father cross the hall_ after entering; the other saw the dog (the usual companion of his walks) run past her door.' Father and dog had not left the dining-room. Herr Parish decides that the same _point de repère_ (the apparent noise of a key in the lock of the front door) 'acted by way of suggestion on both sisters,' producing, however, different hallucinations, 'in virtue of the difference of the connected associations.' One girl associated the sound with her honoured sire, the other with his faithful hound; so one saw a dog, and the other saw an elderly gentleman. Now, first, if so, this should _always_ be occurring, for we all have different associations of ideas. Thus, we are in a haunted house; there is a noise of a rattling window; I associate it with a burglar, Brown with a milkman, Miss Jones with a lady in green, Miss Smith with a knight in armour. That collection of phantasms should then be simultaneously on view, like the dog and old gentleman; all our reports should vary. But this does not occur. Most unluckily for Herr Parish, he illustrates his theory by telling a story which happens not to be correctly reported. At first I thought that a fallacy of memory, or an optical delusion, had betrayed him again, as in his legend of the waistcoat. But I am now inclined to believe that what really occurred was this: Herr Parish brought out his book in German, before the Report of the Census of Hallucinations was published. In his German edition he probably quoted a story which precisely suited his theory of the origin of collective hallucinations. This anecdote he had found in Prof. Sidgwick's Presidential Address of July 1890.[13] As stated by Prof. Sidgwick, the case just fitted Herr Parish, who refers to it on p. 190, and again on p. 314. He gives no reference, but his version reads like a traditional variant of Prof. Sidgwick's. Now Prof. Sidgwick's version was erroneous, as is proved by the elaborate account of the case in the Report of the Census, which Herr Parish had before him, but neglected when he prepared his English edition. The story was wrong, alas! in the very point where, for Herr Parish's purpose, it ought to have been right. The hallucination is believed not to have been collective, yet Herr Parish uses it to explain collective hallucinations. Doubtless he overlooked the accurate version in the Report.[14]