The Doctor met Lewis Carroll and talked to him about King Constantine. (PROSE: The Shadows of Avalon)
In 1857, Carroll, using his original name of Charles Dodgson, photographed the five-year-old Victoria Waterfield. (PROSE: Downtime)
The Fourth Doctor was in possession of a chess set which had been a gift from someone named Reverend Charles Dodgson, given to the Doctor after he rescued Dodgson from a "tulgey wood". He remembered him fondly as "dear old Charley". (AUDIO: Purgatory 12)
While travelling with the Fifth Doctor, Erimem read several of Carroll's poems, including The Hunting of the Snark and Father William. (AUDIO: The Roof of the World)
Charles Dodgson and Lewis Carroll were resurrected as two separate people in the City of the Saved. (PROSE: Of the City of the Saved...)