Lemurian Demonology

Beyond the gate of Agut-atoth are demons beyond number, hungered to madness they tear eternally at the barrier. What the Elder Gods crafted the demons cannot rend asunder but the sorcerer may open the gate for a short time and call through certain things by means of the proper seal and incantations. It is done with utmost care for if the H'klim of the Elder Gods take notice they will slay the sorcerer and should the sorcerer err in the seal or formulae he will surely be consumed by what is called up.
(The Druuna-Cosan Scrolls as translated from the Aklo by Hasper Charris)

The Arkham Witch Box

In the spring of 1692 a woman named Keziah Mason was tried for witchcraft in Arkham, Massachusetts. The old woman was accused of being in league with the devil and many strange artifacts were found in her home and submitted as proof of her crime. Mason confessed freely to witchcraft and declared the various artifacts to be gifts from her infernal mentor, a being she referred to as "Nyarlathotep" or "The Dark Man".
 Several witnesses swore to have seen corpses walking in the forests near Mason's home and when questioned about this necromancy Mason claimed the Dark Man had given her a magical formulae that allowed her to trap the souls of dead men into a box and raise their rotting corpses to be her servants. The transcript of her trial even states that audible moans, wails, and hoarse whispers were heard to issue from the witch box.
Based on the overwhelming evidence and Mason's own confession, she was convicted of witchcraft and sentenced to death. However the convicted woman somehow escaped on the eve of her execution, that same night the witch box and her other possessions also disappeared from a locked room in the local church.
 The story might have ended there had not the witch box been recovered in 1939 during the demolition of a long abandoned farmhouse near Arkham. The item was found in the cellar of the old house near a pit containing the remains of twenty four human beings, some of these cadavers were in a skeletal state and dressed in 17th century clothing while others appeared to be much more recent. The disinterred corpses were assumed to be the work of a grave robbing cult, and since none of the remains could be identified the case was quickly closed by the local authorities and the bodies reburied. The witch box was placed in the care of Miskatonic University and has remained there since.

The Necromancer

The old Necromancer bade Alhazrad to be silent as he chanted an invocation to the Unspeakable Lord of Hali. The two wizards sat in an ancient graveyard on the outskirts of Mandore, protected by a magic circle drawn in their own blood. Alhazrad stole a glance at the necromancer's scrolls. Written in the magical tongue of lost Hyperborea, the scrolls contained secrets of life, death, and the undead.

The necromancer lit the wick of a stinking candle and sprinkled the essential salts over it. Then he spoke, "Now neophyte, watch as the dead rise. While the candle burns they know me as their master and before it burns out I will claim the most able and lay the carrion back to their graves with my art."

Spasms of fear ran through Alhazrad as the graves began to vomit forth the dead. They rose with moans of pain, angry at the interruption of their sleep. The eyeless sockets held nothing but grave worms, but to Alhazrad they seemed...hungry.

The Necromancer strode outside the protective circle and stood among the living dead. He gloated, "Fear them not, though they would devour us living were they not restrained by the candle. Now neophyte, tell me who is greater than he who quickens the dead to make them his slaves?"

Then a sudden gust of wind blew out the candle, plunging them into darkness. Alhazrad fumbled for his flint to reignite it. He heard the sounds of struggle, then screams of agony from his companion. After seconds of desperation Alhazrad restored the candle's flame. In that feeble flickering light, eyes wide with horror, he watched the dead feast on their former master.