It is not possible to define exactly what occurs in the case of the ectoplasm, nor, on account of its vital connection with the medium and its evanescent nature, has it been separated and subjected to even the roughest chemical analysis which might show whether it is composed of those earthly elements with which we are familiar. Is it rather some coagulation of ether which introduces an absolutely new substance into our world? Such a supposition seems most probable, for a comparison with the analogous substance examined at Dr. Crawford's seances at Belfast, which is at the same time hardly visible to the eye and yet capable of handling a weight of 150 pounds, suggests something entirely new in the way of matter. But setting aside, as beyond the present speculation, what the exact origin and nature of the ectoplasm may be, it seems to me that there is room for a very suggestive line of thought if we make Geley's experiments the starting point, and lead it in the direction of other manifestations of psychomaterial activity. First of all, let us take Crookes' classic experiments with Katie King, a result which for a long time stood alone and isolated but now can be approached by intermittent but definite stages. Thus we can well suppose that during those long periods when Florrie Cook lay in the laboratory in the dark, periods which lasted an hour or more upon some occasions, the ectoplasm was flowing from her as from Eva. Then it was gathering itself into a viscous cloud or pillar close to her frame; then the form of Katie King was evolved from this cloud, in the manner already described, and finally the nexus was broken and the completed body advanced to present itself at the door of communication, showing a person different in every possible attribute save that of sex from the medium, and yet composed wholly or in part from elements extracted from her senseless body. So far, Geley's experiments throw a strong explanatory light upon those of Crookes. And here the Spiritualist must, as it seems to me, be prepared to meet an objection more formidable than the absurd ones of fraud or optical delusion. It is this. If the body of Katie King the spirit is derived from the body of Florrie Cook the psychic, then what assurance have we that the life therein is not really one of the personalities out of which the complex being named Florrie Cook is constructed? It is a thesis which requires careful handling. It is not enough to say that the nature is manifestly superior, for supposing that Florrie Cook represented the average of a number of conflicting personalities, then a single one of these personalities might be far higher than the total effect. Without going deeply into this problem, one can but say that the spirit's own account of its own personality must count for something, and also that an isolated phenomenon must be taken in conjunction with all other psychic phenomena when we are seeking for a correct explanation.