Do ghosts speak in all-vowel words?  Who better to know than someone named Vowles!  The Question of Apparitions and Supernatural Voices Considered by William Vowles, 1814.

"The death-candle, the apparition, the ghost, formed so many articles of her creed, and she was not altogether without faith in the doctrine, that, by certain ceremonies and incantations, man may project his power into the sphere of the invisible world, and affect the movements and the thoughts of spirits."  From Sir Cosmo Digby by James Augustus St. John, 1843.

From The Poetical Works of Sir Walter Scott, illustrated by T. Seccombe, 1870.

From The Beggar's Benison by George Mills, 1866.

"The apparition of the murdered lady," from The Skeleton Horseman or the Shadow of Death, 1866.

"A fearful suggestion … crosses my mind. … That you are not of this world."  From The Apparition by James Rymer, 1846.

"The Adept entranced by the apparition of Chrysal in his laboratory," from Chrysal by Charles Johnston, 1821.