From The Spell of Seven, edited by L. Sprague De Camp.

François Joullain, ‘Habit de Furie,’ 1725 (via EnchantedBook).

From The Book of Knight and Barbara by David Starr Jordan, 1899.

"I stepped backward in time.  How else explain my visit to that oddly old-fashioned office—which ceased to exist after I left?"  From Fate magazine, 1960.

This happened to us when we purchased the Medusa plaque pictured here.

Even Medusa (especially Medusa) had bad hair days.  From Unknown Worlds, 1943.

From The Book of Knight and Barbara by David Starr Jordan, 1899. 

Medusa's cat.  From Le Charivari, 1846.

From Kissing Covens by Colin Watson, 1972.

Medusa takes a nap.  From The Book of Knight and Barbara by David Starr Jordan, 1899. 

Here's a precursor to The Gorgon's Alliance, a 1997 strategy video game.  From Nebelspalter, 1919.

From Ya-Hoo magazine (Amherst), 1954.

Medusa's head and the Ophite hierogram, from The Worship of the Serpent by John Bathurst Deane, 1830.

From the University of North Carolina at Chapel Hill's yearbook of 1977.

From the University of North Carolina at Chapel Hill's yearbook of 1975.