Tunguska Scroll
From Tardis Wiki, the free Doctor Who reference
The Tunguska Scroll was recovered in the Tunguska Basin in Russia in 1908. It was acquired by UNIT on 4th June 1972. It was kept in the Black Archive. (SJA: Enemy of the Bane)
Its ashes fell into the hands of the Crimson Hand. (DWM: The Crimson Hand)