No man is privileged to impugn the knowledge of existences which others have derived from their experience; but he who sees, without assenting to realities, audaciously rejects positive proof to himself, where presumptive testimony would be satisfactory to most: he daringly falsifies what he knows to be indubitably true, and secret convictions belie the shameless hardihood of pretended incredulity. These, it is presumed, would be the sentiments of the great author of Rasselas, upon the expression of disbelief in him who had witnessed spectral appearances; and yet the writer of these pages, with a personal knowledge upon the subject, declines to admit that knowledge as good evidence. He would say untruly were he to affirm, that when he saw the corpse-like form, and for some time afterwards, he had no misgivings as to the safety of his friend. It was not until a lapse of six months that the vessel was reported to have touched at a certain port in good condition, and this was followed by a letter from the individual himself, wherein he affirmed his good health; he subsequently wrote, that he and his family were at the place of their destination. This spectral appearance therefore at Ludgate-hill, between eight and nine o’clock of the morning on the 30th of January, was no indication of his death, nor would it have been had he died about that time, although the coincidence of the apparition and his decease would have been remarkable. The case at Carlow only differs from the case at Ludgate-hill by the decease of the lady having been coeval with her spectral appearance to the gentleman who was depressed by her illness. The face which the writer saw looking at him from a closet in the dead of night was no likeness of any one he knew, and he saw each spectre when his faculties had been forced beyond their healthful bearing. Under these circumstances, his eyesight was not to be trusted, and he refuses to admit it, although the spectres were so extraordinary, and appeared under such circumstances that probably they will never be forgotten. * * * * * Coupled with the incidents just related, the death of the king of Naples in January 1825, which was first announced in the “_News_” Sunday paper on the 16th of the month, recalls the recollection of a singular circumstance in the bay of Naples. The fact and the facts preceding it are related by Dr. Southey in his “Life of Nelson.” Having spoken of Nelson’s attachment to lady Hamilton, and his weariness of the world, Dr. Southey proceeds thus:--