Mr. Davey (who, by the way, was at one time deceived almost into conversion by spiritualistic phenomena, and who, before he took up the matter seriously, recorded his conviction that "the idea of trickery or jugglery in slate-writing communications is quite out of the question") was an expert amateur conjurer, and repeated the slate-writing performances of such as Englinton with at least equal skill. He arranged with Mr. Hodgson to give sittings to several ladies and gentlemen, on the condition that they send him detailed written accounts of what they had seen. He did not pose as a medium nor accept a fee, but simply said that he had something to show which his sitters were to explain as best they could, and with due consideration of trickery as a possible mode of explanation. The "medium" has here a decided advantage over Mr. Davey, because his sitters come to him with a mental attitude that entertains, however remotely, the possibility of witnessing something supernatural; and this difference is sufficient to create an adjustment of the powers of observation less fitted to detect trickery than if the performer refrains from announcing himself as the go-between of the supernatural. This is well illustrated in the reports of Mr. Davey's sitters; for a few friends who were told beforehand that they were to witness a sleight-of-hand performance, or were strongly led to believe it such, made much less of a marvel of the performance than those who had not been thus enlightened. "Nevertheless" (I am citing from Mr. Podmore's résumé), "the effect produced was such that a well-known professional conjurer expressed his complete inability to explain the results by trickery; that no one of his sitters ever detected his _modus operandi_; that most were completely baffled, or took refuge in the supposition of a new form of electricity, or 'a powerful magnetic force used in double manner: (1) a force of attraction, and (2) that of repulsion'; and that more than one spiritualist ascribed the phenomena to occult agency, and regarded--perhaps still regard--Mr. Davey as a renegade medium."
Mr. Davey's performances, _as described_ by many of his sitters, like the descriptions of the performances of many a medium, are marvelous enough to demand the hypothesis of occult agency: "Writing between a conjurer's own slates in a way quite inexplicable to the conjurer; writing upon slates locked and carefully guarded by witnesses; writing upon slates held by the witnesses firmly against the under-surface of the table; writing upon slates held by the witnesses above the table; answers to questions written secretly in locked slates; correct quotations appearing on guarded slates from books chosen by the witnesses at random, and sometimes mentally, the books not touched by the 'medium'; writing in different colors mentally chosen by the witnesses, covering the whole side of one of their own slates; messages in languages unknown to the medium, including a message in German, for which only a mental request had been made, and a letter in Japanese in a double slate locked and sealed by the witness; the date of a coin placed by the witness in a sealed envelope correctly written in a locked slate upon the table, the envelope remaining intact; a word written between slates screwed together and also corded and sealed together, the word being chosen by the witness after the slates were fastened by himself, etc., etc. And yet, though 'autographic' fragments of pencil were 'heard' weaving mysterious messages between and under and over slates, and fragments of chalk were seen moving about under a tumbler placed above the table in full view, none of the sitters witnessed that best phenomenon, _Mr. Davey writing_."