"I thank you," answered the apparition, in the same chilly tone; "I cannot accept your kind offer. My visit has already extended to a very unusual length, and I have no doubt I shall be blamed as it is by more reticent ghosts for the excessive openness with which I have conversed upon subjects generally kept back from the living world. Once more," with another ceremonious bow, "I have the honour to wish you a pleasant evening." As he said these words, the fluorescent light brightened for a second, and then faded entirely away. A slightly unpleasant odour also accompanied the departure of our guest. In a moment, spectre and scent alike disappeared; but careful examination with a delicate test exhibited a faint reaction which proved the presence of sulphur in small quantities. The ghost had evidently vanished quite according to established precedent. We filled our glasses once more, drained them off meditatively, and turned into our bedrooms as the clock was striking four. Next morning, Harry and I drew up a formal account of the whole circumstance, which we sent to the Royal Society, with a request that they would publish it in their Transactions. To our great surprise, that learned body refused the paper, I may say with contumely. We next applied to the Anthropological Institute, where, strange to tell, we met with a like inexplicable rebuff. Nothing daunted by our double failure, we despatched a copy of our analysis to the Chemical Society; but the only acknowledgment accorded to us was a letter from the secretary, who stated that "such a sorry joke was at once impertinent and undignified." In short, the scientific world utterly refuses to credit our simple and straightforward narrative; so that we are compelled to throw ourselves for justice upon the general reading public at large. As the latter invariably peruse the pages of "BELGRAVIA," I have ventured to appeal to them in the present article, confident that they will redress our wrongs, and accept this valuable contribution to a great scientific question at its proper worth. It may be many years before another chance occurs for watching an undoubted and interesting Apparition under such favourable circumstances for careful observation; and all the above information may be regarded as absolutely correct, down to five places of decimals.