Charles Lutwidge Dodgson (1832-98), a.k.a. Lewis Carroll, was a lecturer in Mathematics at Oxford University when he wrote Alice in Wonderland (1865) and Through the Looking-Glass (1871).
Mervyn Peake (1911-68) was an artist and writer. His illustration credits include Treasure Island, The Rime of the Ancient Mariner, and the Brothers Grimm's Household Tales. As a novelist, he is best known for his Gormenghast trilogy.