Nebulous and gruesome shreds of blue-fog like wraiths shifted over the sea.
"My Attainment of the Pole"
Frederick A. Cook
Sometimes he was so completely absorbed by his work that the real people around him were shadows and wraiths.
"Fortitude"
Hugh Walpole
Like wraiths they waved desperate ineffectual hands and made sad mimickings of their dead and dusty triumphs....
"Melomaniacs"
James Huneker