In consequence, a crowd perpetually hovering on the borderland of unconsciousness, readily yielding to all suggestions, having all the violence of feeling peculiar to beings who cannot appeal to the influence of reason, deprived of all critical faculty, cannot be otherwise than excessively credulous. The improbable does not exist for a crowd, and it is necessary to bear this circumstance well in mind to understand the facility with which are created and propagated the most improbable legends and stories.[3] [3] Persons who went through the siege of Paris saw numerous examples of this credulity of crowds. A candle alight in an upper story was immediately looked upon as a signal given the besiegers, although it was evident, after a moment of reflection, that it was utterly impossible to catch sight of the light of the candle at a distance of several miles. The creation of the legends which so easily obtain circulation in crowds is not solely the consequence of their extreme credulity. It is also the result of the prodigious perversions that events undergo in the imagination of a throng. The simplest event that comes under the observation of a crowd is soon totally transformed. A crowd thinks in images, and the image itself immediately calls up a series of other images, having no logical connection with the first. We can easily conceive this state by thinking of the fantastic succession of ideas to which we are sometimes led by calling up in our minds any fact. Our reason shows us the incoherence there is in these images, but a crowd is almost blind to this truth, and confuses with the real event what the deforming action of its imagination has superimposed thereon. A crowd scarcely distinguishes between the subjective and the objective. It accepts as real the images evoked in its mind, though they most often have only a very distant relation with the observed fact. The ways in which a crowd perverts any event of which it is a witness ought, it would seem, to be innumerable and unlike each other, since the individuals composing the gathering are of very different temperaments. But this is not the case. As the result of contagion the perversions are of the same kind, and take the same shape in the case of all the assembled individuals. The first perversion of the truth effected by one of the individuals of the gathering is the starting-point of the contagious suggestion. Before St. George appeared on the walls of Jerusalem to all the Crusaders he was certainly perceived in the first instance by one of those present. By dint of suggestion and contagion the miracle signalised by a single person was immediately accepted by all. Such is always the mechanism of the collective hallucinations so frequent in history--hallucinations which seem to have all the recognised characteristics of authenticity, since they are phenomena observed by thousands of persons.