Thus (with the corroborating evidence of Crookes’ thermometer) we may suppose that, after all, the cold airs and shivering sensations which seem so often to accompany apparitions may not be merely subjective to the observer, but may be real phenomena due to physical condensations taking place in his immediate proximity. Moreover, it has to be noted that the condensations may not be merely of water-vapor, but of other substances as well, namely (according to an opinion now gaining ground), of fine matter or effluences provided by the bodies of the sitters present (or some of them) as well as by the body of the medium. The passage last quoted from _Shadowland_ continues: “then began a strange sensation, which I had sometimes felt at seances. Frequently I have heard it described by others as of cobwebs being passed over the face, but to me, who watched it curiously, it seemed that I could feel fine threads being drawn out of the pores of my skin.” And in another passage[117] the same writer describes the cloud which precedes a materialization as “a slightly luminous haze” which often appears “about the head, shoulders, elbows and sometimes the knees and feet (of the medium). Frequently it gathers slowly at the fingers, increasing in density till it resembles a slight transparent film of slightly luminous cotton wool.” Further, she explains that it goes on condensing till it becomes cobwebby and perceptible to touch. The evidence generally seems to show that these clouds are of the nature of effluences from the medium or other person present; and the above quotation affords corroboration of that view and makes easily intelligible the great exhaustion from which mediums often suffer on these occasions. It suggests also that the condensation is by no means of water-vapor only, but of other substances drawn from the interior vitality of the persons concerned, and necessary for the building up of the apparitional form.