We now turn to the other, and concomitantly active cause, in Mr. Podmore's theory, hallucination. 'Many of the witnesses described the articles as moving slowly through the air, or exhibiting some peculiarity of flight.' (See e.g. the Worksop case.) Mr. Podmore adds another English case, presently to be noted, and a German one. 'In default of any experimental evidence' (how about Mr. William Crookes's?) 'that disturbances of this kind are ever due to abnormal agency, I am disposed to explain the appearance of moving slowly or flying as a sensory illusion, conditioned by the excited state of the percipient.' ('Studies,' 157, 158.) Before criticising this explanation, let us give the English affair, alluded to by Mr. Podmore. The most curious modern case known to me is not of recent date, but it occurred in full daylight, in the presence of many witnesses, and the phenomena continued for weeks. The events were of 1849, and the record is expanded, by Mr. Bristow, a spectator, from an account written by him in 1854. The scene was Swanland, near Hull, in a carpenter's shop, where Mr. Bristow was employed with two fellow workmen. To be brief, they were pelted by odds and ends of wood, about the size of a common matchbox. Each blamed the others, till this explanation became untenable. The workrooms and space above were searched to no purpose. The bits of wood sometimes danced along the floor, more commonly sailed gently along, or "moved as if borne on gently heaving waves." This sort of thing was repeated during six weeks. One piece of wood "came from a distant corner of the room towards me, describing what may be likened to a geometrical square, or corkscrew of about eighteen inches diameter.... Never was a piece seen to come in at the doorway." Mr. Bristow deems this period 'the most remarkable episode in my life.' (June 27, 1891.) The phenomena 'did not depend on the presence of any one person or number of persons.' Going to Swanland, in 1891, Mr. Sidgwick found one surviving witness of these occurrences, who averred that the objects could not have been thrown because of the eccentricities of their course, which he described in the same way as Mr. Bristow. The thrower must certainly have had a native genius for 'pitching' at base-ball. This witness, named Andrews, was mentioned by Mr. Bristow in his report, but not referred to by him for confirmation. Those to whom he referred were found to be dead, or had emigrated. The villagers had a superstitious theory about the phenomena being provoked by a dead man, whose affairs had not been settled to his liking. So Mr. Darwin's spoon danced--on a grave.[5]