Strange Tales #5

A scientist rejects science as useless for discovering the secret of time travel and turns to black magic instead. Hearing of a woman related to a witch burned in 1692 living nearby, he spies on her and sees her summon the ghost of her ancestor. She confirms to the ghost that only she can travel through time by means of 'the room without a door.' The scientist gets the witch evicted and buys the house so that he can search for this room. He finds a small box with wallpaper made to resemble a room. He breaks the box open and finds himself transported back to 1692 tied to a burning stake.