A Mr. R——, a gentleman who has attracted public attention by some scientific discoveries, had had a fit of illness at Rotterdam. He was in a state of convalescence, but was still so far taking care of himself as to spend part of the day in bed, when, as he was lying there one morning, the door opened, and there entered in tears, a lady with whom he was intimately acquainted, but whom he believed to be in England. She walked hastily to the side of his bed, wrung her hands, evincing by her gestures extreme anguish of mind, and before he could sufficiently recover his surprise to inquire the cause of her distress and sudden appearance, she was gone. She did not disappear, but walked out of the room again, and Mr. R—— immediately summoned the servants of the hotel, for the purpose of making inquiries about the English lady—when she came, what had happened to her, and where she had gone to, on quitting his room? The people declared there was no such person there; he insisted there was, but they at length convinced him that they, at least, knew nothing about her. When his physician visited him, he naturally expressed the great perplexity into which he had been thrown by this circumstance; and, as the doctor could find no symptoms about his patient that could warrant a suspicion of spectral illusion, they made a note of the date and hour of the occurrence, and Mr. R—— took the earliest opportunity of ascertaining if anything had happened to the lady in question. Nothing had happened to herself, but at that precise period her son had expired, and she was actually in the state of distress in which Mr. R—— beheld her. It would be extremely interesting to know whether her thoughts had been intensely directed to Mr. R—— at the moment; but that is a point which I have not been able to ascertain. At all events the impelling cause of the form projected, be the mode of it what it may, appears to have been violent emotion. The following circumstance, which is forwarded to me by the gentleman to whom it occurred, appears to have the same origin:—