21 February

On 21 February 1968, the Sixth Doctor left Henry Gordon Jago and Professor George Litefoot in the Red Tavern in London, mistakenly believing that it was the 1890s. (AUDIO: Voyage to the New World)

Exactly ten years later, workers in Mexico City uncovered the sacrificial stone at the base of the Great Temple of the Aztecs. (PROSE: The Left-Handed Hummingbird)

On the same day in 1865, while on duty in Gable, West Virginia, Captain Will Johnson wrote a letter to his lover, Claire Bartlett. (PROSE: Blood and Hope)