From Red Ribbon on a White Horse by Anzia Yezierska.

"'So this is the last of Bad Bill, desperado, gun-man, renegade, of Hangman's Gulch,' said the shrieking voice of the ghost of Horn Mountain."  From American Indian Weekly, 1911.

Here's a rare two-headed sheet ghost from the University of Alberta's 1963 yearbook.  See Of Feeding & Caring For Sheet Ghosts.

Via UFO Newsclipping Service, 2001.

"I will deal with my ghost[s], and you will deal with your ghosts."  From Dark Shadows episode 1236.

From the Master Of Monsters II handbook.

From the Wizardry III: Legacy of Llylgamyn handbook.

From The Picket, 1994.  See Of Feeding & Caring For Sheet Ghosts.

"Ghost cat may stalk lighthouse."  Via UFO Newsclipping Service, 2001.

From Ghosts and Goblins by Wilhelmina Harper.

From Arrow Book of Ghost Stories by Nora Kramer.

From Kansas State's 1973 yearbook.

From DePauw's 1905 yearbook.

From the Master Of Monsters II handbook.

That's our own face of blurred panic when there's a knock at the door.  She's reassurred that ghosts don't knock, but of course they very famously do knock on doors and rap on tables.  From Dark Shadows episode 1174.

From the Master Of Monsters II handbook.

Q: "Do your studies haunt you?"

A: Yes, quite literally!  But we exorcise them into books like Of Feeding & Caring For Sheet Ghosts.

From Northwest Christian College's 1952 yearbook.

An unpictured entity.  From Pembroke's 1978 yearbook.

From Ghosts and Goblins by Wilhelmina Harper.